A grist mill of the 1800s employed a water wheel that was 14 m high; 320 liters per minute of water flowed on to the wheel near the top. How much power, in kW, could this water wheel have produced?

Q: A man pushes a lawn mower on a level lawn with a force of 213 N. If 53% of this force is directed…

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Q: How much work can a 6.0-hpmotor do in 3.0h?Express your answer to two significant figures and…

A: The expression for power is,

Q: A 65-kg woman runs up a flight of stairs in 10.0 s. Her net upward displacement is 3.0 m.…

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Q: A man with 80.0 kg mass climbs a stairs with a height of 7.0 m within 15.0 seconds. What is his…

A: P=Et=mght

Q: A 65-kg woman runs up a flight of stairs in 10.0 s. Her net upward displacement is 3.0 m.…

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Q: How much power does it take to lift a 49kg person a 5m vertical distance in 20s?

A: Given: mass, m = 49 kg  height, h = 5 m  time, t = 20 s

Q: An electric motor raises an elevator weighing 1.20 x N a distance of 9 m in 15 s. What is the power…

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Q: A mechanic uses a chain and bloc pulley to lift a 875-kg engine 4.0 m to the top of the garage. the…

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Q: A boy of mass 40 kg climbs a vertical rope 8 meters in length in 12 seconds with constant velocity.…

A: Mass of boy= 40 Kg Time = 12 s Height gain= 8 m

Q: I use a rope 2.00 m long to swing a 10.0-kg weight around my head. The tension in the rope is 20.0…

A: Length of rope = 2 m Mass of object to be swung around the head = 10 kg Tension in the rope = 20 N…

Q: How much power will a 260 N student develop if he/she climbs a flight of stairs 12 m from the ground…

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Q: All the following are units of power except a. hp b. watt С. J/s d. N.m/s e. kg.m/s^2

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Q: If a 75 kg runner can accelerate from standing start to a speed of 10 m/s in 3 seconds, how much…

A: Since the runner starts from a standing position, the initial velocity of the runner is u=0 m/s.…

Q: A diesel engine pumps out 49 kg of water in one second. The water comes out vertically upwards with…

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Q: How much work done in k J( kilo joule) can a 3 hp (horsepower) motor do in 1 hour? (Write the full…

A: Power is the amount of force per unit velocity Power=force×velocity P=Force×distancetimeP×time=work…

Q: A pump needs to lift 504 litres of water per minute to a height of 12.2 m.  What is the minimum…

A: Given that Mass flow rate of water by pump ( dm/dt ) = 504 Litre / mint Water lifted upto the height…

Q: An 82 kg man in basic training climbs a 16 m vertical rope at constant speed in 8 s. What is his…

A: mass of man (m) = 82 kg height (h) = 16 m time (t) = 8 seconds

Q: How much work is done by the normal force?

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Q: An engine develops 10 kW of power. How much time will it take to lift a mass of 200 kg to a height…

A: Given data :- Power P = 10 kW = 10 × 1000 W = 10000 W mass m = 200 kg height h = 40 m g = 10 ms-2

Q: In climbing up a rope, a 78-kg athlete climbs a vertical distance of 6.0 m in 9.0 s.   What…

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Q: The change in energy of a system increases at a rate of 3.5 t + 6.2 t^2, in joules. What is the…

A: We know, P=dWdt

Q: A weight lifter raises a 1093 N weight a vertical distance of 1.80 m in a time interval of 1.95 s.…

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Q: A person weighing 233 N climbs a flight of stairs 6.0 m high in 6.0 s. What power is required to…

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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: How much work is done in lifting a 61.2 kg crate a vertical distance of 10 meters? (Remember: F =…

A: mass of crate (m) = 61.2 kg Vertical distance (h) = 10 m g = 9.8 ms2

Q: Its takes 45 sec for a girl A to climb up a stairs while boy B takes 35 sec for the same job.…

A: In  this question  we discuss  about work done and power.

Q: Joule is a unit of the following: work, power, potential energy, and kinetic energy, true or false?

A: Work: Work = Force ×Displacement      W = F ×S Units of work:    1 J = 1 N m   Power: Power = Work…

Q: A boy of mass 45 kg climbs a vertical rope 9 meters in length in 15 seconds with constant velocity.…

A: Power output is force × velocity. Velocity =9m/15s = 0.6m/s

Q: The electric motor of a model train accelerates the train fromrest to 0.620 m/s in 21.0 ms. The…

A: Using Work-Energy theorem,

Q: An athletic champion can produce one horsepower of power (746 W) for a short period of time. The…

A: Scenario - An athletic champion does work against gravity to develop power. Given : Athlete…

Q: A boy of mass 35 kg climbs a vertical rope 10 meters in length in 12 seconds with constant velocity.…

A: Given Mass of boy , m=35kg Length of rope d=10m Time t=12s Acceleration due to gravity g=9.8m/s²…

Q: A boy of mass 35 kg climbs a vertical rope 10 meters in length in 12 seconds with constant velocity.…

A: Given : m = 35 kg h = 10 m t = 12 seconds

Q: How much work can a 1950 Watt motor do in 15 min? Express your answer in Joules.

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Q: A 40-kg mass is lifted through a distance of 20 m in a time of 3 s. What average power is employed?

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Q: How long does it take a motor with an output of 8 W to lift a 2kg object 90 cm?

A: Given  Power of motor P=8W Mass of object m=2kg Height h=90cm=90100m=0.9m

Q: A car weighing 1.2 tons. Its engine generates power Its value is 2000 newtons. Serious hurry The Car…

A: We have from Newton's second law of motion ,F=ma , where F is force , m is mass and a is…

Q: For a given person, as the time needed to run up a flight of stairs decreases, the power

A: power=work done  Time taken since the work done to run up a flight of stairs is same and the time…

Q: A boy of mass 35 kg climbs a vertical rope 10 meters in length in 12 seconds with constant velocity.…

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Q: A marathon runner of mass 75 kg runs up the stairs to the top of a tower of height 125 m in 8…

A: The expression for find work done in the process is W=Fd=mgd Substitute values in the above equation…