An object of mass m=5kg is being pulled up an inclined plane which is at 40° to the horizontal. The object is pulled at a constant speed of 0.8ms-1 by a force which acts parallel to the inclined plane.
The coefficient of friction between the object and the plane is 0.2
a)Draw a diagram showing the forces acting on the object.
b)Calculate the magnitude of the force of friction acting on the object.
c)Calculate the gain in gravitational potential energy when the object has moved 0.5m (measured parallel to the slope).
d)Calculate the total work done in pulling the block 0.5m (measured along the slope).​