Question

Multiple correct answers type
Two blocks A and B of masses 5kg and 2 kg, respectively, connected by a spring of force constant = 100 $N{m}^{-1}$ are placed on an inclined plane of inclination ${30}^0$ as shown in Fig. If the system is released from rest.
a. There will be no compression or elongation in the spring if all surfaces are smooth.
b. There will be elongation in the spring if A is rough and B is smooth.
c. Maximum elongation in the spring 35 cm if all surfaces are smooth.
d. There will be elongation in the spring if A is smooth and B is rough.

• A. a,
• B. b
• C. c
• D. d
  

Answer 1

Answer: (A), (D)

The correct options are
A a,
D d