The document Previous year questions (2014-20): Motion in a Plane Notes | EduRev is a part of the Class 11 Course Physics 28 Years Past year papers for NEET/AIPMT Class 11.

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**Q 1. The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is given by: [2019]A: 30° westB: 0° ** A

V

V

sin θ = 10/20

sin θ = 1/2

θ = 30^{0} west**Q 2. A particle moving with velocity is acted by three forces shown by the vector triangle PQR. The velocity of the particle will: [2019]A: IncreaseB: DecreaseC: Remain constantD: Change according to the smallest forceAns:** C

As forces are forming closed loop in same order

A: 5 m/s

B: – 4 m/s

C: – 8 m/s

D: 0

Ans:

Solution:

A:

B:

C: Zero

D: T

Ans:

A: 180 deg

B: 0 deg

C: 90 deg

D: 45 deg

Ans:

A: 10√2h

B: 0 h

C: 5h

D: 5√2h

Ans:

Solution:

**Q 7. A particle is moving such that its position coordinates (x, y) are (2m, 3m) at time t = 0, (6m, 7m) at time t = 2s and (13m, 14m) at time t= 5s. Average velocity vector from t = 0 to t = 5s is: [2014]A: B: C: D: Ans:** B

Average velocity Vector,

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