Question

ab box was pushed equally distance on the floor different surface​

Answer 1

Answer     hi

Explanation:

Answer 2

Answer:

Static friction is a self-adjusting force.

The limiting value of friction up to which the body stays at rest till it starts moving is given by, Fs=μmg

where μ is the coefficient of static friction.

Below that limit, the frictional force is equal to the force applied.

Here Fs=0.8×4×10=32N ;   g=10m/s2

Whereas force applied is 19N less than the limiting value of friction.

Hence Frictional force is 19N.