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In all the given cases, blocks are at rest and in contact. The forces applied are as shown. All the surfaces are smooth. Then, in which of the following cases normal reaction the two blocks is zero?
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Important Questions on Newton's Laws of Motion
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A man getting down a running bus falls forward because
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An uniform thick rope of length is kept on a frictionless surface and a force of is applied to one of its ends. Find the tension in the rope at from this end.
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A particle strikes a wall with the velocity at an angle of with the normal to the wall and reflects at the same angle. If remains in contact with the wall for , then the force exerted by the particle on the wall is
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If cricketer catches a ball of mass in moving with , then he experiences a force of
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A force is acting on a particle of mass . What will be the velocity of the particle at if at particle is at rest?
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A body of mass moving on a horizontal surface with an initial velocity of comes to rest after . If one wants to keep this body moving on the same surface with a velocity of , then the force required is
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A block can slide on a smooth inclined plane of inclination , kept on the floor of a lift. When the lift is descending with retardation , the acceleration of the block relative to the incline is
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n-blocks of different masses are placed in contact on a frictionless inclined plane as shown in the figure. They are released at the same time. The force of interaction between and blocks is
