Challenging Physics Problems Based on Laws of Motion for JEE Advanced

This series contains exhaustive collection of challenging problems of all the varieties being asked in JEE (Advanced) Examinations. Here, we have provided collection of the best possible problems for IIT-JEE (JEE Advanced) based on topic Laws of Motion.

Challenging Physics Problems Based on Laws of Motion for JEE Advanced with Solutions

Q.1. The acceleration of the block B in the above figure, assuming the surfaces and the pulleys P₁ and P₂ are all smooth.

(a) F/4m
(b) F/6m
(c) F/2m
(d) 3F/17m

Answer

Answer:

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Q.2. The system shown in the adjacent figure is in equilibrium. All the blocks are of the equal mass m and springs are ideal. When the string between A and B is cut then

(a) the acceleration of block A is 2g while the acceleration of block C is g
(b) the acceleration of block B is 2g while the acceleration of block C is zero
(c) the acceleration of block A is 2g while the acceleration of block B is g
(d) the acceleration of block B is g while the acceleration of block C is zero

Answer

Answer: (b)

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Q.3. Two weights are hung over two frictionless pulleys as shown in figure. What weight W will cause the 300kg block to just start moving to the right ?

(a) 108 kg
(b) 115 kg
(c) 98 kg
(d) 120 kg

Answer

Answer: (a)

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Q.4. A uniform rope of length L and mass M is placed on a smooth fixed wedge as shown. Both ends of rope are at same horizontal level. The rope is initially released from rest, then the magnitude of initial acceleration of rope is

(a) M (cos α – cos β) g
(b) zero
(c) M (tan α – tan β) g
(d) None of these

Answer

Answer: (b)

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Q.5. Two masses m and M are attached to strings as shown in the figure. In equilibrium, tanθ is

(a) 1 + (2M/m)
(b) (1 + 2m/M)
(c) 1 + (M/2m)
(d) None of these

Answer

Answer: (b)

More Questions will be added from time to time. So, stay tuned!

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