Chapter 7 – Friction

As shown in the figure, the friction force acting on the block is 1) 50 N, 2) 30 N, 3) 20 N, 4) None 2) 30 N 3) 20 N 4) None As shown in the figure the friction force acting on the block is 1) 50 N September 9, 2020 Category: Cengage NEET by [...]

A particle is projected up a 37∘ rough incline with velocity v0. If μ=1/2, the speed with which it returns back to the starting point is v. Then v/v0 is A particle is projected up a 37∘ rough incline with velocity v0. If μ=1/2 the speed with which it returns back to the starting point [...]

A particle is projected up a rough inclined plane of inclination θ and friction coefficient μ. If the time of ascent is half of the time of descent, the friction coefficient μ is equal to A particle is projected up a rough inclined plane of inclination θ and friction coefficient μ. If the time of [...]

A ball is thrown vertically upwards with a velocity of 10 ms−1. It returns to the ground with a velocity of 8 ms−1. If g=9.8 ms−2 , then the maximum height attained by the ball is nearly (assume air resistance to be uniform) A ball is thrown vertically upwards with a velocity of 10 ms−1. [...]

Two objects A and B are thrown upwards simultaneously with the same speed. The mass of A is greater than the mass of B. Suppose the air exerts a constant and equal force of resistance on the two bodies. Which object will go high? Consider a car moving on a straight road with a speed [...]

In an imaginary atmosphere, the air exerts a small force F on any particle in the direction of the particle’s motion. A particle of mass m projected upward takes a time t1​ in reaching the maximum height and t2​ in the return journey to the original point. Then Consider a car moving on a straight [...]

A ball is thrown vertically upward with some velocity. A constant air resistance acts. If the time of ascent is t1 and that of descent is t2, then A ball is thrown vertically upward with some velocity. A constant air resistance acts. If the time of ascent is t1 and that of descent is t2 [...]

A body is sliding down an inclined plane having coefficient of friction 0.5. If the normal reaction is twice that of the resultant downward force along the incline, the angle between the inclined plane and horizontal is A body is sliding down an inclined plane having coefficient of friction 0.5. If the normal reaction is [...]

The upper half of an inclined plane of inclination 45 degree is perfectly smooth while the lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom if the coefficient of friction between the block and the lower half of the plane is [...]

A block is released from the top of an inclined plane of inclination θ. Its velocity at the bottom of plane is v. If it slides down a rough inclined plane of the same inclination , its velocity at bottom is v/2. The coefficient of friction is A block is released from the top of [...]