# A pair of horses uses 350 N to pull a wagon 100 m in 20 seconds. How much work is done, and how much power is used?

Nov 18, 2015

$\left(a\right) .$ Work = $35 \text{kJ}$

$\left(b\right) .$ Power = $1.75 \text{kW}$

#### Explanation:

Work done = force x distance moved in direction of force:

$W = 350 \times 100 = 35000 \text{J"=35"kJ}$

Power is the rate of doing work:

Power in Watts = work done / time taken:

$P = \frac{35000}{20} = 1750 \text{W"=1.75"kW}$