A ball is dropped from an ocean cliff. The sound of the ball splashing into the ocean is heard 4.0 s later. How high is the cliff? The speed of sound is 340 m/s, and assume air resistance is negligible.

Q: A student throws a ball straight up into the air, and it travels to a height of 11 m. Ignoring air…

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Q: When X = 5t^2+ 10t -3, the velocity at 4s is: 50 m/s .A 110 m/s .B 25 m/s .C 30 m/s .D

A: The position of an object is given by a function of time as shown below. x=5t2+10t-3 The velocity is…

Q: A stone is thrown straight upward with a speed of 20 m/s. It is caught on s way down at a point 5.0…

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Q: A person can survive a feet-first impact at a speed of about 12 m/s (27 mi/h) on concrete; 15 m/s…

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Q: A light plane must reach a speed of 35 m/s for takeoff.How long a runway is needed if the (constant)…

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Q: A dynamite blast at a quarry launches a rock straight upward, and 1.8 s later it is rising at a rate…

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Q: An object is thrown vertically upward such that it has a speed of 25 m/s when is reaches two thirds…

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Q: Steve, alias Rocket man, is propelled upward with an acceleration of 4 g's (1g= 9.8m/s^2) for 7s.…

A: The pictorial representation of the given problem is shown below   The given problem can be solved…

Q: During a walk on the Moon, an astronaut accidentally drops his camera over a cliff. It leaves his…

A: Given : t = 2 s voy = 0 m/s vy = -5.70 m/s (Negative because of downward direction) T = 8 s

Q: A jet must reach a velocity of 77m/s for takeoff. If the runway is 1800 meters long, what must the…

A: The initial velocity of the jet is, The final velocity of the jet is, The distance traveled by jet…

Q: A rock is thrown directly upward from the edge of the roof of a building that is 66.2 meters tall.…

A: Given Part -1: Height of building = 66.2 m Time taken to hits the ground = 4.00 s We have to…

Q: During a walk on the Moon, an astronaut accidentally drops his camera over a cliff. It leaves his…

A: Given: The initial speed of the camera is 0 m/s. The final speed of the camera after 2 s is 7.6 m/s.

Q: A package is dropped from a helicopter moving upward at 15 m/s. If it takes 16.0 s before the…

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Q: An object is dropped from 151 m. How long takes the object to reach the ground? Ignore the air…

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Q: A 30 m high roller coaster has an initial velocity of 5 m/s. How fast is it going when it reaches a…

A: Given data *The height of the roller coaster is h1 = 30 m *The initial velocity of the roller…

Q: A stone was thrown vertically with initial velocity of 49 m/s from

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Q: A bullet is fired with a muzzle velocity of 600 m/s. If the length of the barrel is 750 mm, what is…

A: Given data: Muzzle velocity, V=600 m/s Length of the barrel, L=750 mm=750×10-3 m=0.750 m Our…

Q: ou drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed…

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Q: A jumbo jet must reach a speed of 360 km/h on the runway for takeoff. What is the lowest constant…

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Q: A helicopter is ascending at a constant speed of 12m/s and drops a package from a height of 64m. how…

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Q: A rocket is launched from a height of 3 m with an initial velocity of 15 m/s. At what time will the…

A: Given, Initial height of the rocket, h = 3 m initial speed of the rocket, u = 15 m/s

Q: A light plane must reach a speed of 82 m/s for takeoff. How long a runway is needed if the…

A: Given, Speed of the light plane v = 82 m/s acceleration a = 33 m/s2   find the length of the runway

Q: A car enters a tunnel at 24 m/s and accelerates steadily at 2.0 m/s2. At what speed does it leave…

A: Initial velocity,u=24m/s acceleration ,a=2m/s2  time,t=8 s let v be final velocity  so v=u+at (from…

Q: A soccer player kicks a rock horizontally off a 40.0-m high cliff into a pool of water. If the…

A: Solution: Given that yi = 40 m yf = 0 when he kicks it horizontally vyi=0 tsound=3 s vsound=343 m/s…

Q: object is dropped from rest and impacts the ground with a velocity of 9.6 m/s. What height was it…

A: Use kinematics

Q: A penny is dropped from rest from the top of the Willis (Sears) Tower in Chicago. Considering that…

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Q: A lead ball is dropped in a lake from a diving board 3.50 m above the water. It hits the water with…

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Q: A pebble is released from rest at a certain height and falls freely, reaching a speed of 4 m/s at…

A: Given :             A pebble at rest u = 0                          speed   v = 4 m/s…

Q: A roller-coaster goes over a 12 m tall hill then approaches a 30 m hill. What is the minimum…

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Q: A takes 3 hours longer than B to walk 40 km. If A doubles his rate, he can cover the same distance…

A: Let B take hours to cover 40km . So, we have Speed of B=40B A take 3 hours longer that is B+3 to…

Q: A lead ball is dropped into a lake from a diving board 5.0m above the water. After entering the…

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Q: From a speed of v= 48 kph, a train decelerates at the rate of 2m/min², along the path. How far in…

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Q: If an object were to freely, from what height would it need to drop to reach a speed of 70.0m / s…

A: Given data:  Initial velocity (v0) = 0 m/s Final velocity (v) = 70.0 m/s Required: The height (h) of…

Q: Echoes return in 2.5 secs to a person standing in front of a cliff. How far away is the cliff? The…

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Q: An object is thrown vertically upward with a speed of 12 m/s. How much time passes before it reaches…

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Q: An object undergoes acceleration 2.31 +3.6j m/s? for 7.9 s at which time its velocity is 33i +15f…

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Q: An automobile starting from rest speeds up to 72 kph with a constant rate of 4 m/s', runs at this…

A: Given data u=0V=20 m/sa=4 m/s2a=-5 m/s2

Q: A school bus traveling along at 12.6km/h slows to 4.32km/h in 2.50s. How far did it travel (in m)?

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Q: A car traveling at 30 m/s runs out of gas while traveling up a 5.0° slope. How far will it coast…

A: The component of the acceleration along inclination be:

Q: A particle moves according to the equation y(t) =1.5t2+4t-1, where y is in meters and t is in…

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Q: b) 36m c) 1.5m d) 60m

A: Calculate the time taken to travel 20 m vertical height.         h=uyt+12gt220 m=0+129.81 m/s2t2…

Q: On the earth, an astronaut can safely jump to the ground from a height of 1.0 m; her velocity when…

A: Given: The height from the ground is 1.0 m.

Q: What average speed, most nearly, is required to run a mile (1.6 km), in 4 minutes? a. 5.0 m/s b.…

A: Distance to be travelled is S = 1.6 km  => S = 1.6 × 1000 = 1600 m  Time required = 4 min => t…

Q: Steve Rogers jumps vertically on flat floor and leaves the surface with a velocity of 8.5 m/s…

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Q: A 'polish cannon' is used to launch a tennis ball upward at time t = 0.0 s, from a point on a roof…

A: When the ball reaches the maximum height, the velocity at the maximum height will be zero. Apply the…

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: