Q: If a flea can jump straight up to a height of 0.670 m, how long is it in the air
A: Take the upward direction to be positive. The equation of motion is given by, vy2=v0,y2+2ayΔy Here,…
Q: An airplane needs to reach a velocity of 203.0 kan/h to take off. On a 2000m runway, what is the…
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Q: ) How long, in seconds, does it take the sandbag to reach the ground from the moment it falls off…
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Q: A girl runs for a distance of 120 m at a speed of 6 m/s. How long does it take her to cover this…
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Q: How many seconds does it take the alligator to speed up from 5 m/s to 35 m/s
A: Given data: The initial speed of an alligator is: u=-5 m/s The final speed of an alligator is: v=-35…
Q: A car accelerates from 13 m/sm/s to 23 m/sm/s in 6.4 ss . How far did it travel in this time?
A: The acceleration is,
Q: A ball dropped from a helicopter takes 1.6 s to fall the final 35 m. From what height was itdropped?
A: The initial velocity when it has to still fall 35m is
Q: Starting with a velocity of 5 knots along positive x-axis, a vessel accelerates for 10 minutes with…
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Q: A boat can move at a constant velocity of 2.0 m/s in still water. How long will it take for the boat…
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Q: You are driving down a street at 55 km/h. Suddenly, a child runs into the street. If it takes you…
A: Given Speed of vehicle v= 55 km/h = 55 × 5 / 18 m/s v = 15.3 m/s Time taken to react t = 0.75 s…
Q: How far have you traveled after going a constant 5.06 m/s for 8.70 seconds?
A: Given that, Speed = 5.06 m/s Time = 8.70 s Formula :…
Q: A motorist travels for 2h at 70 km/h and 1h at 100 km/h. What is her average speed for the trip? *
A: The initial speed, u=70 km/h The initial time taken, t1=2 h The final speed, v=100 km/h The…
Q: a certain airplane has a velocity of 60 m/s, and running with a constant acceleration of 12 m/s ^ 2,…
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Q: The world record for the hundred meter dash is 9.58 s. What is the corresponding average speed in…
A: Answer:- Distance (S) = 100 m Time (t) = 9.58 s Speed (V) = Distance/ time V = S/t V = (100…
Q: A brick is dropped from rest from a height of 5.0 m. How long does it take for the brick to reach…
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Q: It takes Usain 8 s to run from x= 0, to x -+ 10 m and then back to x = -80 m. What is his average…
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Q: 2. A person jogs 4.0 km in 32 minutes, then 2.0 km in 22 mimutes, and finally 1.0 km in 16 minutes.…
A: Given : Time taken by the person to jog 4 km = 32 min Then, Time taken by the person to jog 2 km =…
Q: Over a distance of 260 meters, an automobile going initially at +5.0 m/s accelerates evenly at +0.20…
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Q: An arrow is shot straight up in the air at an initial speed of 50.0 m/s. After how much time is the…
A: Let the upward direction is taken as negative and downward direction as positive. Time taken by…
Q: What must be the average speed to travel 250 km in 2 hr? And in m / s?
A: Introduction: In physics, many of the physical quantity, came across in day to day life. Speed is…
Q: If a flea can jump straight up to a height of 0.44 m, how long is it in the air?
A: when the flea jump straight upward its acceleration a = -g = -9.8 m/s2 total distance to travel s =h…
Q: A car goes from rest, up to 108km/h in 10 seconds. What is its acceleration in m/s^2? * O 3 m/s2…
A: The velocity of the car is, v=108 kmh1000 m1 km1 h3600 s=30 m/s
Q: A car traveling 95 km/h is 210 m behind a truck traveling 75 km/h. How long will it take the car to…
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Q: To stop the car, a car leaves a skid marks 200m long on the highway. Assuming a deceleration of…
A: Given:Initial velocity, Vi = 0m/s Acceleration, a = 7.5 m/s²Distance,d=200 mFind Final velocity,…
Q: A ball is thrown vertically downward from the edge of a high cliff with an initial velocity of 25…
A: Initial velocity of ball is u = 25 ft/s = 25/3.281 = 7.62 m/s Time traveled by the ball is t = 1.5 s…
Q: An object with an initial velocity of 5m/s5m/s slows to 1m/s1m/s over a distance of 10m10m. What is…
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Q: An airliner reaches its takeoff speed of 163 mph in 36.2 s. What is the magnitude of its average…
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Q: A rock is dropped from a 154-m-high cliff. How long does it take to fall (a) the first 77.0 m and…
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Q: A stone is thrown vertically upward from the ground with an initial velocity of 40 ft/s. How high…
A: Given Initial velocity of stone = 40 ft/s in upward direction We have to calculate the maximum…
Q: When it takes a car 8.9 s to increase its speed from 4.5 m/s to 25.4 m/s, what is the magnitude of…
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Q: A certain freely falling object requires 1.05 s to travel the last 25.5 m before it hits the ground.…
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Q: A rock is dropped out of a window 47m high. How far does it fall in the first 2.6 seconds?
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Q: You drive a car 1500 ft to the east, then 2500 ft to the north. Ifthe trip took 3.0 minutes, what…
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Q: What is the average speed of a car during the first 10 seconds of acceleration when it starts from…
A: Given- Acceleration a=3 ft/s2 Time t =10 seconds
Q: A person on top of a 100-meter building throws a ball upward with an initial velocity of 15 m/s. How…
A: Given, Height of the building, H = 100 minitial velocity of the ball, vo = 15 ms
Q: A stone is thrown vertically upward from the ground with an initial velocity of 40 ft/s. How high…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: An airplane taking off from a landing field has a run of 500 m. If it starts from rest, moves with a…
A: Suppose that the velocity at which the plane takes off is v and acceleration is a Initial speed is u…
Q: if a flea can jump straight up to a height of 0.440m what is its initial speed as it leaves the…
A: The expression to find the initial speed is,
Q: The height of a helicopter above the ground is given by h = 3.15t^3, where h is in meters and t is…
A: Finding the time taken by the mailbag to reach the ground.Given information:The expression of height…
Q: A Boeing 747 airliner, initially at rest, undergoes a constant acceleration of 10 m/s2 down the…
A: Given data The acceleration of the airliner is a = 10 m/s2. The time is taken by the airliner is t =…
Q: A car is traveling at the rate of 90 ft/sec when the brakes are applied. The car begins decelerating…
A: When a decelerating force is applied to an object travelling at a certain velocity, it will…
Q: A 747 airliner reaches its takeoff speed of 156 mi>h in 35.2 s.What is the magnitude of its…
A: Given Data: The final speed of airliner is, v=156 mi/h The time required to takeoff is, t=35.2 s…
Q: How long does a ball stay in the air if it is 20m/s and it is thrown straight up?
A: Given,
Q: A coin was tossed vertically straight upward with initial velocity 4.6 m/s. As the coin reaches…
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Q: In a 5.00 km race, one runner runs at a steady 12.0 km/h and another runs at 14.5 km/h. How long…
A: s = 5 km = 5000 mv1 = 12 kmhr = 3.33 m/sv2 = 14.5 kmhr = 4.03 m/s Since the runners are running at a…
Q: How long does it take for a ball dropped off a building of height 63.5 m to hit the ground if the…
A: Write the given values with the suitable variables. h=63.5 mu=0 m/s Here, h is the height and u is…
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- One strategy in a snowball fight is to throw a snowball at a high angle over level ground. Then, while your opponent is watching that snowball, you throw a second one at a low angle timed to arrive before or at the same time as the first one. Assume both snowballs are thrown with a speed of 25.0 m/s. The first is thrown at an angle of 70.0 with respect to the horizontal. (a) At what angle should the second snowball be thrown to arrive at the same point as the first? (b) How many seconds later should the second snowball be thrown after the first for both to arrive at the same time?One strategy in a snowball fight is to throw a snowball at a high angle over level ground. Then, while your opponent is watching that snowball, you throw a second one at a low angle timed to arrive before or at the same time as the first one. Assume both snowballs are thrown with a speed of 25.0 m/s. The first is thrown at an angle of 70.0 with respect to the horizontal. (a) At what angle should the second snowball be thrown to arrive at the same point as the first? (b) How many seconds later should the second snowball be thrown after the first for both to arrive at the same time?A moving beltway at an airport has a speed 1 and a length L. A woman stands on the beltway as it moves from one end to the other, while a man in a hurry to reach his flight walks on the beltway with a speed of 2 relative to the moving beltway. (a) What time interval is required for the woman to travel the distance L? (b) What time interval is required for the man to travel this distance? (c) A second beltway is located next to the first one. It is identical to the first one but moves in the opposite direction at speed 1. Just as the man steps onto the beginning of the beltway and begins to walk at speed relative to his beltway, a child steps on the other end of the adjacent beltway. The child stands at rest relative to this second beltway. How long after stepping on the beltway does the man pass the child?
- A pirate has buried his treasure on an island with five trees located at the points (30.0 m, 20.0 m), (60.0 m, 80.0 m). (10.0 m, 10.0 m), (40.0 m, 30.0 m), and (70.0 m, 60.0 m), all measured relative to some origin, as shown in Figure P3.46. His ships log instructs you to start at tree A and move toward tree B, but to cover only one-half the distance between A and B. Then move toward tree C, covering one-third the distance between your current location and C. Next move toward tree D, covering one-fourth the distance between where you are and D. Finally move toward tree E, covering one-fifth the distance between you and E, stop, and dig. (a) Assume you have correctly determined the order in which the pirate labeled the trees as A, B, C, D, and E as shown in the figure. What are the coordinates of the point where his treasure is buried? (b) What If? What if you do not really know the way the pirate labeled the trees? What would happen to the answer if you rearranged the order of the trees, for instance, to B (30 m, 20 m), A (60 m, 80 m), E (10 m, 10 m), C (40 m, 30 m), and D (70 m, 60 m)? State reasoning to show that the answer does not depend on the order in which the trees are labeled. Figure P3.46An ice hockey player is moving at 8.00 m/s when he hits the puck toward the goal. The speed of the puck relative to the player is 29.0 m/s. The line between the center of the goal and the player makes a 90.0° angle relative to his path as shown in Figure 3.65. What angle must the puck's velocity make relative to the player (in his frame of reference) to hit the center of the goal?You have a great job working at a major league baseball stadium for the summer! At this stadium, the speed of every pitch is measured using a radar gun aimed at the pitcher by an operator behind home plate. The operator has so much experience with this job that he has perfected a technique by which he can make each measurement at the exact instant at which the ball leaves the pitchers hand. Your supervisor asks you to construct an algorithm that will provide the speed of the ball as it crosses home plate, 18.3 m from the pitcher, based on the measured speed vi of the ball as it leaves the pitchers hand. The speed at home plate will be lower due to the resistive force of the air on the baseball. The vertical motion of the ball is small, so, to a good approximation, we can consider only the horizontal motion of the ball. You begin to develop your algorithm by applying the particle under a net force to the baseball in the horizontal direction. A pitch is measured to have a speed of 40.2 m/s as it leaves the pitchers hand. You need to tell your supervisor how fast it was traveling as it crossed home plate. (Hint: Use the chain rule to express acceleration in terms of a derivative with respect to x, and then solve a differential equation for v to find an expression for the speed of the baseball as a function of its position. The function will involve an exponential. Also make use of Table 6.1.)
- A helicopter blade spins at exactly 100 revolutions per minute. Its tip is 5.00 m from the center of rotation. (a) Calculate the average speed of the blade tip in the helicopter's frame of reference. (b) What is its average velocity over one revolution?A paper in the journal Current Biology tells of some jellyfish-like animals that attack their prey by launching stinging cells in one of the animal kingdoms fastest movements. High-speed photography showed the cells were accelerated from rest for 700. ns at 5.30 107 m/s2. Calculate (a) the maximum speed reached by the cells and (b) the distance traveled during the acceleration.Over the Christmas break, you are making some extra money for buying presents by working in a factory, helping to move crates around. At one particular time, you find that all the handtrucks, dollies, and carts are in use, so you must move a crate across the room a straight-line distance of 35.0 m without the assistance of these devices. You notice that the crate has a rope attached to the middle of one of its vertical faces. You decide to move the crate by pulling on the rope. The crate has a mass of 130 kg, and the coefficient of kinetic friction between the crate and the concrete floor is 0.350. (a) Determine the angle relative to the horizontal at which you should pull upward on the rope so that you can move the crate over the desired distance with the force of the smallest magnitude. (b) At this angle of pulling on the rope, how much work do you do in dragging the crate over the desired distanced?
- A seagull flies at a velocity of 9.00 m/s straight into the wind. (a) If it takes the bird 20.0 min to travel 6.00 km relative to the Earth, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will he take to return 6.00 km? (c) Discuss how the wind affects the total round-trip time compared to what it would be with no wind.A sandal is dropped from the top of a 15.0-m-high mast on a ship moving at 1.75 m/s due south. Calculate the velocity of the sandal when it hits the deck of the ship: (a) relative to the ship and (b) relative to a stationary observer on shore. (c) Discuss how the answers give a consistent result for the position at which the sandal hits the deck.How can an estimate be of value even when it is off by on order of magnitude? Explain and give an example.