Question

A wooden log is displaced to a distance of 20m in 10 seconds by applying 500N effort. Calculate the work done and power.

a) Work done = 10,000 J, Power = 500 W
b) Work done = 1000 J, Power = 50 W
c) Work done = 2000 J, Power = 100 W
d) Work done = 5000 J, Power = 250 W

Answer 1

The work done is 10,000 J and the power is 1000 W.So, the correct option is:

b) Work done = 10,000 J, Power = 1000 W

Step-by-step explanation:

The work done can be calculated using the formula:

Work = Force x Distance

Given that the distance is 20m and the force is 500N, we can substitute these values into the formula:

Work = 500N x 20m = 10,000 J

So, the work done is 10,000 Joules.

The power can be calculated using the formula:

Power = Work / Time

Given that the work done is 10,000 Joules and the time is 10 seconds, we can substitute these values into the formula:

Power = 10,000 J / 10 s = 1000 W

So, the power is 1000 Watts.So, the correct option is:

b) Work done = 10,000 J, Power = 1000 W