IV. Work out (show all the necessary steps) 1. The velocity ratio of a certain inclined plane is 4. The efficiency of this machine while a trolley
is moving with a constant velocity up its surface is 60%.
A, determine the angle that the inclined plane makes with the horizontal
B. find the actual mechanical advantage of the machine
C, calculate the coefficient of kinetic friction b/n the trolley and the surface of the incline.
2. An inclined plane rises 30cm for every 50cm distance measured up the plane. The coefficient of
kinetic friction in the surface of the incline and a block of weight 400N, which is pulled up the
plane is 0.2. find
A. The minimum effort force acting on the object parallel to the plane
B, the velocity ratio, and
C, the efficiency of the system,
3. A wooden block of mass 2kg is 20cm thick, 10cm wide and 30cm tall. Calculate
A, the minimum pressure the block exert on the surface
B, the maximum pressure the block exerts on the surface