Question

A block of mass 2kg is lying on a rough
inclined plane. The force needed to move the
block up the plane with uniform velocity by
appling a force parallel to the plane is 100N.
The force needed to move the block up with
an acceleration of 2 ms-2 is
​

Answer 1

Answer:

Let angle of inclination is θ as shown in figure.

Given , Velocity is moving with uniform velocity so block is in equilibrium.

⇒mgsinθ=100N

Let Force F is applied to the block parallel to the inclined plane to move the block with acceleration a=2m/s

2

⇒F−mgsinθ=ma ⇒F=mgsinθ+ma

⇒F=104N