Choose the BEST answer to the following: Lift a 100-N crate with an ideal pulley system by pulling a rope downward with 25 N of force. For every 1-m length of rope pulled down, the crate rises (a) 25 cm. (b) 25 m. (c) 50 cm. (d) None of these.

Q: If an object falls from the top of the building, what will its speed be after 2.60 seconds?

A: Given data: Initial velocity (V0) = 0 m/s Time (t) = 2.60 s Required: The final velocity(v)

Q: It takes an elevator in a skyscraper 4. Os to reach its cruising speed of 10. 0 . A 60.0 kg…

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Q: A net force of 450N accelerates a bike and rider at 3.5m/s^2, what is the mass of the bike and…

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Q: A 1500-kg car traveling 65 km/hr can come to a stop within a distance of 25 meters when the brakes…

A: We need to calculate the friction force acting on the 1500-kg car.

Q: How much force is needed to accelerate a 50 kg skier at 3 m/sec?

A: Write the given values with suitable variables. m=50 kga=3 m/s2 Here, m denotes the mass and a…

Q: A crane very slowly lifts a 2.50×102-kg2.50×102-kg crate a vertical distance of 16.0 m.

A: Work done is expressed as W = F.d = Fdcos(x) Where x is the angle between F and d. Since the force…

Q: What average net force is required to bring 1000[kg] car to rest from a speed of 4.0[m/s] within a…

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Q: A Yamaha bike accelerates from the stoplight (from Om/s) at 8 meters per second per second, its…

A: Given data:  Initial velocity (V0) = 0 m/s Acceleration (a) = 8 m/s2 Time (t) = 6 seconds Required:…

Q: ) One of the following forces acts at a distance: Select one: a. Gravitational force O b. Spring…

A: Given : Asked to select the force that acts at a distance.

Q: How much force does a 15-kg leg exert during running if the person has a 2-m stride and runs at a…

A: Mass of the leg (m) = 15 kg Speed (v) = 8 m/s Energy = 1/2 m v2  .       E = (1/2 )× 15 × (8)2…

Q: Two masses are connected by a string over a frictionless pulley as shown. What is the acceleration…

A: Given data m1=6 kgm2=2 kgg=9.81 m/s2

Q: Softball mass of 0,29 kg is pitched of 86.4 km/h. Whin it reaches the plate, it may haved slowed. by…

A: Given, The mass of the soft ball, m =0.29 kg  Speed, vi =86.4 km/hr = 24 m/s  Distance, d =15 m  And…

Q: What is the force due to the acceleration caused by gravity on a mass of 35.7kg if it is placed on…

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Q: How much force in pounds is required to push the 400.0N physics book up a 350 incline at a constant…

A: Given data Weight of book is W=400.0 N Angle of incline is θ=35o Acceleration of book is a=0 Find…

Q: How large a net force is required to accelerate a 1,703-kg SUV from rest to a speed of 12.9 m/s in a…

A: Net Force required....Fnet= 624.149 Newtons

Q: When Fatima rides her bicycle at 5 m/s, the drag force acting on her and her bicycle is 6 N. If she…

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Q: What forces are acting on a dropped book that falls to the floor? Gravity only Gravity and air…

A: Required Forces acting on the dropped book.

Q: Show that a freely falling rock drops a distance of 45 m when it falls from rest for 3 s.

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Q: What is the velocity of a rollercoaster at the bottom of a track that is 70.5m high if it starts…

A: Given data: height of the track, h=70.5 m final velocity of the roller coaster, v=?

Q: A man walked on a road his speed was 50 m/s after two minutes He hit a rock and his speed become 30…

A: We are using equation of motion ; v= u + at  u = initial velocity; v= final velocity ; t = time; a=…

Q: A bowling ball weighing 60.0 N initially moves at a speed of 4.20 m/s. How long must a force of 47.5…

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Q: A block slides down a smooth inclined plane with an acceleration of 4.9 m/s? .If the block weighs 49…

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Q: What is the mass of a bowling ball that exerts a downward force of 160 N on your skull after gently…

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Q: A 900-kg car is going 20 m/s along a level road. How large a constant retarding force is required to…

A: Given data: Mass of the car = 900kg Speed of car along the road(v)= 20m/s Required distance to stop…

Q: An elevator motor lifts a 2650-kg load a height of 39 m in 12 s.

A: Energy gained by a body as it climbs a certain height or energy needed to move a body up a cetrain…

Q: Calculate the force needed to accelerate a train whose mass is 1000metric tons from rest to a…

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Q: A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat…

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Q: What net force is required to make a 15 kg box move at a constant speed of 2.0 m/s.

A: Given: Mass, m = 15 kg; constant speed, v = 2.0 m/s

Q: An 1700 keg elevator has a cable that can support 25,000 N of force. If it carries ten people at 50…

A: Given, mass of an elevator, m = 1700 kg maximum tension, T = 25000 N mass of the person, m = 50 g

Q: A girl weighing 45kg is standing on the floor, exerting a downward force of 200N on the floor. The…

A: Mass of the girl (m)=45kg Force exerted (F) =200 N (In down ward direction)

Q: What average force is required to stop a 950-kg car in 8.0 s if the car is traveling at 95km/h ?

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Q: A woman skis from rest a downhill of 65 m high. If the friction is neglected, calculate her speed in…

A: Energy conservation: As we know energy can neither be created nor destroyed it can only be converted…

Q: When a basketball player dribbles a ball, it falls to the floor and bounces up.  Is a force required…

A: When the ball hit the ground then there is collision after the the momentum of the ball changes.…

Q: What is the acceleration of a 600,000 kg freight train, if each of its three engines can provide…

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Q: Person pushing a parked car of mass 400 2 (2) kg with a force of 200 newtons Its speed is 5 m/s.…

A: M= 400kg  F= 200N

Q: Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of…

A: Using third equation of motion i.e. Given : v=0 m/s, u=90 Km/h = 25 m/s, s=120 m

Q: How large a net force is required to accelerate a 1597 kg suv from rest to a speed of 7.9m/s in a…

A: mass, m=1597 kginitial speed, v=0 ms-1final speed, v=7.9 ms-1distance travelled,s=249 m

Q: A force accelerates a cart from 0 to 5 m/s while it travels 15 meters. Would the same force cause it…

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Q: How much force will you have to exert in order to push a 2700 N piano up a ramp that is 2.5 m high…

A: Height of ramp= 2.5 m Ramp length= 7 m Weight of piano (W)= 2700 N Let the ramp is inclined at Angle…

Q: A car weighing 1.2 tons. Its engine generates a force of 2000 Newtons. Take enough time to reach a…

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Q: A box with a mass of 10 kg is at rest on a table. The normal force acting on the box is 98 N up 989…

A: Newton's 2nd law is defined as F=ma Here F is the net force, m is mass and a is acceleration.

Q: If you push a 3Kg book across your desk at a constant speed of 2 m/s with a force of 7N what is the…

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Q: A bowling ball weighing 46.5 N initially moves at a speed of 5.10 m/s. How long must a force of 44.5…

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Q: A skydiver is speeding up after jumping out of a plane. List ALL the forces acting upon them. *…

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Q: A 9.0-kg hanging weight is connected by a string over a pulley to a 5.0-kg block sliding on a flat…

A:

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!