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The given figure shows a wooden block at rest in equilibrium on a rough horizontal plane being acted upon by forces F1 = 10 N, F2= 2 N as shown. If F1 is removed, the resultant force acting on the block will be
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Important Questions on Newton's Laws of Motion (With Friction)

MEDIUM
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 7
A lift is moving upwards with a uniform velocity v in which a block of mass m is lying. The frictional force offered by the block, when coefficient of friction is μ=0.5 will be
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JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 8
A box of mass 8 kg is placed on a rough inclined plane of inclination θ. It's downward motion can be prevented by applying an upward pull F and it can be made to slide upwards by applying a force 2F. The coefficient of friction between the box and the inclined plane is
HARD
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 9

A block of mass 15 kg is resting on a rough inclined plane as shown in the figure. The block is tied by a horizontal string which has a tension of 50 N. The coefficient of friction between the surfaces of contact is

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MEDIUM
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 10
A horizontal force just sufficient to move a body of mass 4 kg lying on a rough horizontal surface is applied to it. The coefficient of static and kinetic friction between the body and the surface are 0.8 and 0.6, respectively. If the force continues to act even after the block has started moving, the acceleration of the block in m s-2 is (g=10 m s-2)
HARD
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 11
A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given. The upper half of an inclined plane with inclination ϕ is perfectly smooth while the lower half is rough.
HARD
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 12
A body of mass m is launched upon a rough inclined plane making an angle 45° with horizontal. If the time of ascent is half of the time of descent, the frictional coefficient between plane and body is
HARD
JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 13
A wooden block of mass M resting on a rough horizontal floor is pulled with a force F at an angle ϕ with the horizontal. If μ. is the coefficient of kinetic friction between the block and the surface, then the acceleration of the block is
 
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JEE Advanced
IMPORTANT
PHYSICS For Joint Entrance Examination JEE (Advanced) Mechanics I>Chapter 7 - Newton's Laws of Motion (With Friction)>Exercises>Q 14
Find the coefficient of kinetic friction between the object and the incline, when a object takes n times more time to slide down 45° rough inclined plane as it takes to slide down a perfectly smooth 45° incline.