A 500 kg horse can provide a steady output power of 750 W (that is, 1 horsepower) when pulling a load. How about a 38 kg sled dog? Data show that a 38 kg dog can pull a sled that requires a pulling force of 60 N at a steady 2.2 m/s. What are the specific power values for the dog and the horse? What is the minimum number of dogs needed to provide the same power as one horse?

Q: A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What…

A: Given,mass of the car, m = 710 kgspeed of the car, v = 23 msdrag force, F = 500 Nslope of the…

Q: A small motor is used to operate a lift that raises a load of bricks weighing 1200N to a height of…

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Q: 1. What is the total mechanical energy (TME) of a 1000kg motorcycle resting on the top of a 10m…

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Q: An elevator cab has a mass of 4510 kg and can carry a maximum load of 1910 kg. If the cab is moving…

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Q: How much power is required to lift a heavy solid concrete beam with mass 91.22 kg upward with a…

A: Given Mass =91.22 kg speed v =3.8 m/s

Q: A man manages to ride a bicycle (total mass 95 kg), 10 m/s from rest, up a hill 230 m high against…

A: Given:mass,m=95 kghigh,∆h=230 mspeed,v=10 m/sdistace,d=1500 mTime,t=6 minute=360 sec.Now,Total work…

Q: A 64 kg human sprinter can accelerate from rest to 10 m/sm/s in 3.2 s . During the same time…

A: P=∆E∆t=0.5mv2f-v2i∆t

Q: a = 1.2 ms? A Smart Car accelerates from rest as shown. 12. If the constant acceleration occurs over…

A: m=Mass of smart car=860 kga=Acceleraiton of car=1.2 m/s2s=Displacement of car=30 m

Q: A 2.0-kg potato has been launched out of a potato cannon at 9.0 m/s. What is the kinetic energy? If…

A: mass, m = 2 kg, velocity, v = 9 m/s , height, h = 4 m

Q: What average power would a 1500 kg speedboat need to go from rest to 25 m/s in 6 seconds if the…

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Q: A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

A: mass of dragster = 450 kg Initial velocity = 0 m/s final velocity = 120 m/s distance moved = 400 m…

Q: Football players measure their acceleration by seeing how fast they can sprint 40 yards (37 m). A…

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Q: A tower crane has a hoist motor rated at  167 hp. If the crane is limited to using  65.0 % of its…

A: A tower crane has a hoist motor rated at  167 hp. If the crane is limited to using  65.0 % of its…

Q: what is the power required for a 55 kg student to run up a set of stairs that has a height of 20 m…

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Q: if an 80 kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average…

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Q: What average power is needed to lift a 65-kg vendor vertically upward at a uniform speed of 0.44…

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Q: A horse is pulling a sled at a velocity of 3.5 m/s. If the horse's power output is 250 W, what is…

A: Given data:  Velocity (v) = 3.5 m/s Power (P) = 250 W Required: Force (F)

Q: 1. If 68 W of power is producing 18 seconds, how much work is done? b. A set of pulleys lifts an 800…

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Q: A 160-kg object is lifted at a constant speed through a height of 36 m by a crane. If the crane…

A: If a body is lifted up to a height  with a constant speed, the force needed is equal to its weigh…

Q: Compute for amount of power generated in each case Case 1: Pushing a 5 kg ball cart from a side of…

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Q: I have a motor that is rated for 6000 W. What is the maximum amount of work that the motor can do in…

A: Given data The power of the motor is P = 6000 W The time taken to work is t = 10 s The mass of the…

Q: A top fuel dragster with a mass of 600.0 kg starts from rest and completes a quarter mile (402 m)…

A: Given: mass of top fuel dragster, m = 600 kg Initial speed, u = 0 (starting from the rest) Final…

Q: A warehouse worker uses a forklift to raise a crate of pickles on a platform to a height 3.75 m…

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Q: Using the work and energy relations, solve for the constant force "P" required for a system…

A: The work energy theorem states that the work done by the system of forces is equal to the change in…

Q: A football player is dragging a 100 kg sled across an Astroturf field at a constant speed of 5 m/s…

A: Mass is sled (m) = 100kg  Velocity (v) = 5m/s Tension in the rope is (F) = 500N

Q: A warehouse worker uses a forklift to lift a crate of pickles on a platform to a height 3.75 m above…

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Q: A parachute is used to slow a 3.1 kg model rocket from a speed of 32 m/s to 10 m/s. If the parachute…

A: Apply work-energy theorem on the parachute-rocket system, and solve for the work-done by the…

Q: A 65.00-kg runner begins her exercise by moving with a velocity of 2.50 m/s. She then runs up a…

A: Kinetic energy is given by,  KE=12mv2 Potential energy is given by , PE=mgh Given : Mass m=65 kg…

Q: Someone takes 15 minutes to walk up a hill 100 m high. His weight is 600 N. How much work did he do…

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Q: In order to test energy principles, I decide to do the following experiment with my son at the…

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Q: A 1000-kg car accelerates from 0 to 15 m/s in 5.0 s with negligible friction and air resistance.…

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Q: A 2.80-kg object has a velocity (6.20 î - 2.40 ĵ) m/s. (Note: From the definition of the dot…

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Q: 2000 pound truck is driving at a constant velocity of 35 miles/h. How much power (in hp) is needed…

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Q: What is the kinetic energy of a 12 000 kg truck moving at a speed of 25 m/s? Select one: a. 3.8 x…

A: We know Kinetic energy is given by : K.E.=12mv2 And Given : m=12000 Kg v =25 m/s

Q: A object 2 kg is moving in one dimension with a velocity given by  V(t)= 1 / 2 t^2  at t=4 s.…

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Q: To pass a slow-moving truck, you want your fancy 1.30 * 103@kg car to accelerate from 13.4 m>s…

A: Let E1 and E2 denote the initial and final kinetic energy of the car, E denote the change in kinetic…

Q: How much power is required to raise a 30-kg crate a vertical distance of 6m in a time of 4 seconds?…

A: Given, Mass=30kg Distance=6m Time=4sec

Q: The aircraft carrier USS George Washington has mass 1.0 ×108kg. When its engines are developing…

A: Let Pout be the total power output of the engines, P is the power used to push the ship through the…

Q: A bodybuilder lifted a 1000 N weight 20 cm above his head as shown in the figure below. The athlete…

A: Given, weight, mg = 1000 Ndistance above his head, h = 20 cmheight of the bodybuilder, L =180 cmg =…

Q: What average mechanical power (in W) must a 72.0 kg mountain climber generate to climb to the summit…

A: Given :      Mass of the climber, m = 72 kg      Height of the hill, h = 345 m      time taken, t =…

Q: 6. A boy pulls a sled with a mass of 20 kg horizontally over a surface with a coefficient of sliding…

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Q: A 700 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

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Q: How much power is required to raise a 30-kg crate a vertical distance of 6m in a time of 4 seconds?…

A: The potential energy of a body is given by PE = mgh, where m = the mass of the body g = acceleration…

Q: What is the average power output of a 55.0 kg woman who does 50 deep knee bends in which her center…

A: The expression for the output power is,

Q: 10. A small motor is used to operate a lift that raises a load of bricks weighing 1200 N to a height…

A: 10. Given : F = 1200 N h = 15 m t = 30 s

Q: An initially (t = 0) stationary 2.0 kg object accelerates horizontally and uniformly to a speed of…

A: Solution

Q: A 1500 kg sports car accelerates from rest to 95 km/h in 7.0 s What is the average power delivered…

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