# National Standard Examination in Physics (NSEP) Solved Paper 2016 Part-11

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Q: 38. Vector A, B, C lie in XY plane and their resultant is R. The magnitudes of A, B and R are 100, 200 and 200 respectively. The angles made by these vectors with the positive direction of X axis are respectively. Therefore the magnitude and the angle made by C with positive direction of X axis respectively are

(A)

(B)

(C)

(D) 124, 6.2°

Answer: (D)

Q: 39. Two particles A and B are situated 10 m apart along X axis, B being farther right of A, at t =0. Particle A is moving at 0.75 m/s parallel to +Y axis while B at 1 m/s along –X axis. After a time t they come closest to each other. Therefore, t is

(A)

(B)

(C)

(D)

Answer: (B)

Q: 40. Out of the following differential equations, one that correctly represents the motion of a second’s pendulum is

(A)

(B)

(C)

(D)

Answer: (D)

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