College

Consider a block of mass 6 kg on a rough plane inclined at 25° to the horizontal. A force, \( F \), of magnitude 37,173 N is applied to this block to keep it moving at a constant velocity.

What is the normal force?

Answer :

The normal force is 53.3 N.

What is the normal force on an object?

We have to note that the force that is acting on the object may be a single force or a system of forces. In this case, the force that is acting on the object would have many components including the normal force.

You must note that the normal force is the force that in a direction that is opposite to the weight of the object but does have the same magnitude as the weight of the object.

Thus we can see that the normal force is obtained from;

R = mgcosθ

m = mass

g = acceleration due to gravity

θ = angle

R = 6 * 9.8 * cos 25

R = 53.3 N

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