Question

An ox can apply a maximum force of 1000N. It is taking part in a cart race and is able to pull the can at a constant speed of 30m/s while making its best effort. Calculate the power developed by the ox.

Answer 1

$\text{Given, maximum force = 1000 N, constant speed = 30 m/s}$
$\text{power} = \frac{ \text{work done}}{ \text{time taken}}$
$=\frac{Force \times\:\text{displacement}}{\text{time taken }}$
$= \text{Force } \times \text{constant speed }$
= 1000N × 30 m/s
= 30000 Nm/s = 30000 W = 30 KW

Answer 2

Given :
Force=1000N
Speed=v=20m/s

Power=?

Formula to be used:

Power =Work done/time

=Force x Displacement/time

=force x speed 

=1000N x 30m/s

=30,000watt

=30kW

So, Power developed by Ox is 30kW