Question

Work done by friction force is positive or negative

Answer 1

Answer:

Negative

Explanation:

Negative

bcz friction force is always acts opposite to displacement of particle .

Answer 2

Normal friction force is defined as the cumulative force compressing any two parallel surfaces, and the direction of friction is always perpendicular to the surface.

Explanation:

• Therefore, the word done by friction force can be either positive when the body in motion is in the direction of friction or negative when the body is placed in the direction opposite to friction or zero when there is no displacement of the object.

To learn more:

1. Imaginary conversation between narayana murthy and you when you met him:

https://brainly.in/question/9127023  

2. The software company promoted by Narayana Murthy is (a) Wipro (b) Infosys (c) Satyam (d) HCL:

https://brainly.in/question/9193714