Question

A block is pulled up on an inclined plane making 30 degrees angle with horizontal it moves up with 1 m/s^2 acceleration what is the power delivered 4s after the motion starts

Answer 1

= 2
= 30∘
= 1/
2
0 = 4
a) By definition, power is
=


,
where is work and is time. We know that = , where is distance covered by a block and is a
force acting on a block. Let us direct x axis along hypotenuse for simplicity. So, component of the
gravitational force acting on the block is
= = sin − ,
see figure above. Because the friction force = = cos , = sin − cos ⇒
= (sin − cos ) = 1/
2