
Two weights and are suspended from the ends of a light string passing over a smooth fixed pulley. If the pulley is pulled up at an acceleration , the tension in the suspension of pulley is,


Important Questions on Newton's Laws of Motion
An uniform rope of length and mass is placed on a smooth fixed wedge as shown in the figure. Both ends of the rope are at the same horizontal level. If the rope is initially released from rest, then the magnitude and the initial acceleration of the rope is


One end of the massless rope which passes over a massless and frictionless pulley is tied to a hook while the other end is free. The maximum tension that the rope can bear is . With what value of minimum safe acceleration can a man of climb down the rope? (Assume acceleration due to gravity .)

In the figure, the blocks , and each of mass have acceleration , and , respectively. and are external forces of magnitudes and , respectively. Then

If masses are released from the position shown in the figure, then the speed of mass just before its collision with the floor will be

Three blocks with masses , and are connected by strings as shown in the figure. After an upward force is applied on block the masses move upward at a constant speed . What is the net force on the block of mass ? ( is the acceleration due to gravity)

Two masses of and are connected to a pulley as shown in the figure. What will be the acceleration if the pulley is set free? ( acceleration due to gravity) (Assume that the pulley is an ideal and ideal string as well)

Two bodies of and are tied to a string as shown in the figure. If the table and the pulley both are smooth, then the acceleration of body will be equal to
