A 1000 kg car is initially travelling at 26ms26ms along a horizontal road when the driver hits the brakes. The brakes provide a constant force that slows the car to a stop in 10 seconds. The power generated by the brakes was Answer Watts.

What average mechanical power (W) must a 76.5kg mountain climber generate to climb to the summit of a hill of height 405 m in 46.0 min? Due to in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body

A Ford F-150 pickup truck has a mass of 1950 kg.   One truck is equipped with an Ecoboost 2.7 liter V6 engine that produces a useful power output of 242 kW.        (a)  How long in seconds does it take the truck to start from rest and reach a speed of 12.5 m/s, assuming no friction effects and it is traveling on a level road?       (b)  How long will it take to reach the speed of 12.5 m/s from rest, if the truck also climbs a hill that has a height of 2.75 m?

A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 19.9 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. ___hp(b) Find the instantaneous power output of the engine at t = 12.7 s, just before the car stops accelerating. ____hp

A motorist driving a 1332-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.00 s. Ignoring friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

(a) What is the power output in watts and horsepower of a 73.0 kg sprinter who accelerates from rest to 10.1 m/s in 3.50 s? power in watts ____ W power in horsepower _____hp (b) Considering the amount of power generated, do you think a well-trained athlete could do this repetitively for long periods of time?

A tower crane has a hoist motor rated at 169 hp. If the crane is limited to using 65.0% of its maximum hoisting power for safety reasons, what is the shortest time in which the crane can lift a 5.50 x 10 kg load over a distance of 89.0 m? Assume the load is lifted at a constant velocity. t = S 仙登

A car accelerates uniformly from rest to 29.7 m/s in 8.07 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if (a) the weight of the car is 7.22 × 103 N, and (b) the weight of the car is 1.40 × 10^ N.

A toad with mass of 190 g leaps into the air to catch a fly. If the toad's jump was at an angle of 37 degrees with respect to the horizontal, and with an initial velocity of 3.1 m/s, what is its kinetic energy (in Joules) when it reaches its maximum vertical displacement?

A 1.50 ✕ 103-kg car starts from rest and accelerates uniformly to 16.2 m/s in 11.1 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp(b) Find the instantaneous power output of the engine at t = 11.1 s, just before the car stops accelerating. hp