Define power.

1. (a)Define power.[1]
2. (b)(i)A car of mass 1700 kg moves in a straight line along a slope that is at an angle θ to the horizontal, as shown in [Figure 3.1]. The car moves at constant velocity for a distance of 25 m from point A to point B. Air resistance and friction provide a total resistive force of 440 N that opposes the motion of the car. For the movement of the car from A to B: (i) state the change in the kinetic energy change in kinetic energy = ...................................................... J[1]
3. (b)(ii)(ii) calculate the work done against the total resistive force. work done = ...................................................... J[1]
4. (c)(i)The movement of the car in (b) from A to B causes its gravitational potential energy to increase by 4.8 × 10⁴ J. Calculate: (i) the increase in vertical height h of the car for its movement from A to B h = ............................................................ m[2]
5. (c)(ii)(ii) angle θ. θ = ............................................................ °[1]
6. (d)The engine of the car in (b) produces an output power of 1.7 × 10⁴ W to move the car along the slope. Calculate the time taken for the car to move from A to B. time = ............................................................ s[2]

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