The electric motor of a model train accelerates the train from rest to 0.660 m/s in 16.0 ms. The total mass of the train is 665 g. Find the average power delivered to the train during its acceleration. W

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Q: An athlete lifts a 410 N set of weights from ground level to a position over her head, a vertical…

A: Given data:  Weight = 410 N Distance (d) = 1.90 N Weight moved at constant speed Required: Work done…

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Q: III When you ride a bicycle at constant speed, nearly all the energy you expend goes into the work…

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Q: From the energy equation obtain the work W, spent on friction.

A: Conservation of energy Wf=∆KE+∆PE=12mv2-u2+mghf-hi=mv2-u22+ghf-hi

Q: A 1-kg rock is dropped from a height of 6.0 m. a. What is the mechanical energy of the rock? b. At…

A: Apologies. We only answer one question at a time. we will answer the first one as the exact one…

Q: The electric motor of a model train accelerates the train from rest to 0.765 m/s in 24.5 ms. The…

A: a)power is defined as the work per unit time.work is nothing but change in kinetic energy.in this…

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Q: An elevator weighing 3000N ascends at a constant speed of 8.omis. How much power must the motor…

A: Given : Force (F) = 3000 N Speed (v) = 8.0 m/s

Q: Every year, there is a foot race to the top of the Empire State Building. The vertical distance…

A: The power is the rate of doing of work and it is given by-      where the work done is the product…

Q: Initial O v = 0 Final Y = 0 A 14 kg ball initially at rest rolls down a 142 m tall hill. When the…

A: Given: The initial speed of the ball is 0 m/s. The final speed of the ball is 31.1 m/s. The height…

Q: Two Engines, A and B, can do the same amount of work. However, A has a greater power rating than B.…

A: Solution: Work is the amount of energy transferred in a process when an external force is applied.…

Q: A 18,000 kg aircraft is lifted to a height of 12 m. How much potential energy does the aircraft…

A: Given that-Mass of the aircraft, m= 18000 kgHeight, h= 12 mPower,P= 15000 WattWe know that-Potential…

Q: A 3010kg speedboat is traveling on a lake (with no current) and shuts off its engine. The boat…

A: Given information: The mass of the speedboat, m=3010 kg The force applied on the boat, F=526 N…

Q: A34-N box starting at rest slides down a rough 5.0-m long ramp, inclined at 30° with the horizontal.…

A: In this question we first find the coefficient  of kinetic friction  and then find net downward…

Q: A truck travelling at a speed of 50 km/h has a kinetic energy of 600 KJ. If the speed of the truck…

A: Required : The kinetic energy of the truck.

Q: A 655-N Marine in basic training climbs a 11.5-m vertical rope at a constant speed in 9.00 s. What…

A: Given : F = 655 N h = 11.5 m t = 9 s

Q: How much energy is required to run a 35 W light bulb for 4.0 min? a. 840 J b. 1400 J c. 140 J d.…

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Q: The electric motor of a model train accelerates the train from rest to 0.520 m/s in 30.0 ms. The…

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Q: A projectile of mas m = 1 kg is launched with an initial velocity V = (1.8 7+ 2.2 ) . What is the…

A: Given: The mass is m= 1kg. The velocity is v→=1.8 i^+2.2 j^ ms. At the highest point the velocity…

Q: The electric motor of a model train accelerates the train from rest to 0.560 m/s in 33.0 ms. The…

A: Given : Initial speed (vi) = 0 because train starts from rest Final speed (vf) = 0.560 m/s Time (t)…

Q: A model train powered by an electric motor accelerates from rest to 0.640 m/s in 22.0 ms. The total…

A: Given Information,Initial Velocity u=0Final Velocity v =0.64 m/stime(t) = 22 ms  = 22×10-3…

Q: A radio-controlled car powered by an electric motor accelerates from rest to 0.600 m/s in 22.0 ms.…

A: Solution:   Given Values, Initial Velocity (u) =0 m/s (since, it starts from rest)Final Velocity (v)…

Q: A machine does 2500 J of work in 1 min. What is the power developed by the machine? A. 21 W B. 42 W…

A: Solution 1 Given that :- Work done W = 2500 J Time t = 1 min = 60 sec The power P can be written as…

Q: 6s oss The electric motor of a model train accelerates the train from rest to v in 97.0 × 10-³ s.…

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Q: A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of…

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Q: A model train powered by an electric motor accelerates from rest to 0.600 m/s in 26.0 ms. The total…

A: The initial velocity of the train v=0 m/s The final velocity of the train v=0.600 m/s The time taken…

Q: If a blow dryer uses 1.1 x 10³ J of energy, and it is in use for 15 minutes, what is its power? the…

A: Given, energy consumed E=1.1x103W

Q: A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 234/…

A: Given that Volume of water V = 2347 m3 Net mass of the water m = 2347000 kg Height of fall h = 112 m

Q: A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By…

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Q: Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable…

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Q: A bungee jumper has a mass of 74.3 kg and falls a distance of 113 m before the bungee catches and…

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Q: How long will it take a 1700 W motor to lift a 315 kg piano to a sixth-story window 15.5 m above?

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Q: 1. Emma pushes a 45.0kg box across a level floor with an applied force of 155N [30° above…

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Q: Lightbulb A was found out to give 30.0W of power, producing the same brightness as lightbulb B…

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Q: A puppy lifts up his favorite toy with his mouth performing 500 J of work.in 1.5 seconds. What is…

A: given -         work done by puppy = 500 J       Time taken  = 1.5 sec

Q: My sister Sara is pulling a box along a horizontal surface with the force F inclined at an angle 0…

A: To find :  True or false - work done by force of gravity is zero

Q: An ice cube is placed in a microwave oven. Suppose the oven delivers 135 W of power to the ice cube…

A: Let the power is denoted by P and the energy be denoted by E.

Q: A 1900-kg pile driver is used to drive a steel beam into the ground. The pile driver falls 6.00 m…

A: Given: mdriver=1900kgyi,driver=6.09myf,driver=0mvf,driver=vi,driver=0m/sThe distance travelled by…

Q: A horse pulls a carriage a distance of 76.5 m, Find the force applied if the horse did 5000 J of…

A: Given data: Distance covered is, d=76.5 m. Work done by horse is, W=5000 J.

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.