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Friction

24.A wedge of...

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24.A wedge of mass M makes an angle theta with the horizontal .The wedge is placed on horizontal frictionless surface .A small block of mass M is placed on the inclined surface of wedge .What horizontal force F must be applied to the wedge so that force of friction between the block and wedge is zero

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Q. A wedge of mass M makes an angle

θ

with the horizontal. The wedge is placed on horizontal friction surface. A small block of mass m is placed on the inclined surface of wedge. What horizontal force F must be applied to the wedge so that the force of friction between the block and wedge is zero.

m

i s p l a c e d o n a w e d g e (t r i a n g u l a r b l o c k) o f m a s s

. T h e w e d g e m o v e s o n a s m o o t h h o r i z o n t a l s u r f a c e w h a t s h o u l d b e t h e f o r c e

a p p l i e d o n t h e w e d g e t o t h e r i g h t, s o t h a t

m$ remains stationary with respect to wedge. (Ignore any friction)

A

placed on a rough horizontal surface. Block

B

1 k g

slips down the inclined plane (of angle

45^{0}

with horizontal) of the wedge. Find the frictional force acting on wedge

A

on the rough horizontal surface (in N), if wedge if stationary

(g = 10 m / s^{2}) .

Q. A block of mass 2 kg is kept on a smooth wedge of mass 3 kg and wedge is kept on a rough horizontal surface as shown in the figure. A vertical force of 60 N is applied on the block as shown in the figure. What should be the minimum coefficient of friction between the wedge and horizontal surface so that wedge remains at rest during the motion of the block on the wedge?

Q. In the situation shown in figure, a wedge of mass m is placed on a rough surface, on which a block of equal mass is placed on the inclined plane of wedge. The friction coefficient between the wedge and the block and also between the ground and the wedge is

μ

. An external force F is applied horizontally on the wedge towards the right, assuming block does not slide on the wedge. Find the minimum value of Force

F

at which the block will start slipping.

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