
All surfaces shown in figure are assumed to be frictionless and the pulleys and the string are light. The acceleration of the block of mass is :



Important Questions on Laws of Motion












The machine as shown has rods of length connected by a pivot at the top. The end of one rod is connected to the floor by a stationary pivot and the end of the other rod has roller that rolls along the floor in a slot. As the roller goes back and forth, a weight moves up and down. If the roller is moving towards right at a constant speed, the weight moves up with a :





Two blocks and of masses and respectively are connected by a massless inextensible string passing over a frictionless pulley as shown in the figure. Block A is lifted until block B touches the ground and then block A is released. The initial height of block A is when block B just touches the ground. The maximum height reached by block from the ground after the block A falls on the ground is

Calculate the acceleration of the block and trolly system shown in the figure. The coefficient of kinetic friction between the trolly and the surface is ( mass of the string is negligible and no other friction exists).



