Question

A body slipping on a rough horizontal plane moves with a deceleration of 4.0m/s square. What is the coefficient of kinetic friction between the block and the plane

Answer 1

Answer:

0.4

Explanation:

Hence, the coefficient of the kinetic friction between the block and the plane is 0.4.

Answer 2

Information provided to us :

• A body slipping on a rough horizontal plane moves with a deceleration of 4.0m/s².

To Calculate :

• Coefficient of kinetic friction between he block and the plane?

As we have been provided with declaration it means that acceleration is of -4m/s².

As it is moving on a straight plane so,

• Normal reaction is acting in upward direction.
• Gravitational force is exerting down.
• Whereas friction is acting in opposite direction to force applied that is on L.H.S.

We can say that :

• N = mg

We know that :

• friction force (f) = μN

Substitute the value of normal reaction (N) here,

>> f = μmg

>> ma = μmg

>> a = μg

>> 4 = μ × 10

>> μ = 0.4

Therefore,

• Coefficient of Kinetic friction is 0.4