Question

Using a force of 28.0 Newton, a student pulls a 70.0 Newton weight along the tabletop for a distance of 15.0 meters in 3.0 seconds. Compute the power developed by the student.

Answer 1

Answer:

140 watt

Explanation:

We are given that

Force applied by student ,F=28 N

Weight pulled  by students=70 N

Displacement,s=15 m

Time=3 s

We have to find the power developed  by the student.

Work done=w=$F\times s$

Work done by the student=$28\times 15=420 J$

Power=$\frac{work\;done}{time}$

Using the formula

Power=$\frac{420}{3}=140watt$

Hence, the power developed by the students=140 watt