Physics, asked by ritigoradia567, 1 month ago

A horizontal force pulls a box along a horizontal surface. The box gains 30J of kinetic energy and 10J of thermal energy is produced by the friction between the box and the surface. How much work work is done by the force?

Answers

Answered by XxItsUrValentinexX

Answer:

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The work done by friction is the force of friction times the distance traveled times the cosine of the angle between the friction force and displacement; hence, this gives us a way of finding the distance traveled after the person stops pushing.

Answered by amikkr

Given: Gain of kinetic energy = 30J

Thermal energy produced by the friction = 10J

To find: Work done by the force

Solution:

Since a horizontal force pulls a box along a horizontal surface then it is equal to the sum of kinetic energy and the energy produced by the friction between the box and the surface.
Work done by the force is equal to all the form of energy that the body acquires.

Work done by the force = Kinetic energy + Work done by friction

= 30 + 10 = 40J

Therefore, the work done by the force is 40J.

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