5. Circle the one with more Kinetic energy for each case and briefly explain why. a) A 25 kg mass or a 30 kg mass going 5 m/s. b) Two 10 kg masses, one going 75 m/s, one going 45 m/s. c) car at rest or a car rolling down a hill. d) A heavy bike or a light bike.

Q: During a drag race Car A does work in moving 500 m in 4 seconds whereas Car B does the same work in…

A: Given two cars A and B does same work. Time of car A  tA = 4 sec Time of car B tB = 5 sec We have to…

Q: How much work must be done to stop a 1100-kg car traveling at 111km / h ? (Hint: You will need to…

A:

Q: Differentiate between work and power.

A: Work and power are two important concepts of mechanics. Both are scalar quantities.

Q: You are a caring a 20 Newton box up a flight of stairs raising its elevation by 5 m. After you drop…

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Q: Calculate the power if 814 Joules of work gets done in 10 seconds

A: Given Data: Work Done, W = 814 Joules Time, T =10 seconds

Q: What is the relation between work and energy?

A: Work: If a force is applied to a body and the body displaced  by a distance then the product of the…

Q: How much work does a supermarket checkout attendant do on a can of soup he pushes 0.490 m…

A:

Q: How much work does a supermarket checkout attendant do on a can of soup he pushes 0.670 m…

A: The work done is given by  Work = force x displacement

Q: how much power would you have produced if you lifted 200 kg upwards 2 meters in 0.5 seconds?

A: Given Mass m = 200 kg Height h = 2 m Time t = 0.5 s

Q: The amount of energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift…

A: Given: Power = 0.1 kW = 100 W Time = 1 minute = 60 sec Mass of object = 1 kg

Q: How much work does a supermarket checkout attendant do on a can of soup he pushes 0.320 m…

A: The given values are, d=0.320 mF=5.10 N

Q: How much work must be done by frictional forces in slowing a 1,059-kg car from 33.0 m/s to rest?…

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Q: How much work is done on a downhill skier by an average breaking force of 813 newtons to stop her in…

A:

Q: If a car engine can generate 26,093 W of power in 3.3 seconds, how much work does the engine do?

A: Power is the rate at which work is done. P =W/t  Where, P = power  W = work done t = time taken

Q: Explain, in terms of the definition of power, why energy consumption is sometimes listed in…

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Q: How much work does a supermarket checkout attendant do on a can of soup he pushes 0.320 m…

A: Given data:  Displacement (d) = 0.320 m Force (F) = 5.20 N Required: Work done (W)

Q: If you push a car with a force of 600 N on a level driveway for 15 m, how much work do you do on…

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Q: A spider walks on a path that is at 25 ∘. Calculate the power output of a 0.42g spider as it walks…

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