2nd Inter : Velocity - Motion in a straight line

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Prepared by Sri. Krishna Prasad Eati, M.Sc.(Physics)

The wind is blowing from south at 10ms⁻¹ but to a cyclist it appears blowing from the east at 10ms⁻¹. The velocity of cyclist is

1 point

10√2 ms⁻¹ towards S-W

10√2 ms⁻¹ towards N-W

10√2 ms⁻¹ towards S-E

10√2 ms⁻¹ towards N-E

Clear selection

A particle is moving eastwards with a velocity of 5 ms⁻¹. In 10s. the velocity changes to 5 ms⁻¹ northwards. The average acceleration in this time is?

1 point

1/√2 ms⁻² towards north east

1/2 ms⁻² towards north

1/√2 ms⁻² towards north west

Zero

Clear selection

A ship "A" streams down north at a speed of 8 Kmph and ship "B" towards west at a speed of 6 Kmph. The velocity of A with respect to B is

1 point

10 Kmph Tan⁻¹[4/3] North of East

10 Kmph Tan⁻¹[4/3] East of NOrth

10 Kmph NE

2 Kmph Tan⁻¹[4/3] North of East

Clear selection

A person 'P' in the train moving to South with 80Kmph and his friend 'Q' moving to West at 60Kmph. 'Q' finds 'P' traveling with a velocity of

1 point

100Kmph, tan⁻¹(4/3) S of E

100Kmph, tan⁻¹(4/3) E of S

100 Kmph S of E

100 Kmph N of E

Clear selection

A particle is moving eastwards with a velocity 15ms⁻¹. Suddenly it moves towards north and moves with the same speed in a time 10 sec. The average acceleration during this time is

1 point

3/√2 NE

3√2 NE

3/√2 NW

3√2 NW

Clear selection

If a cyclist takes one minute to complete half revolution on a circular path 60m radius. What is average velocity ?

1 point

3ms⁻¹

2ms⁻¹

4ms⁻¹

1ms⁻¹

Clear selection

A boy walks to his school at a distance of 6m with constant speed 2ms⁻¹ and walk back with constant speed of 1ms⁻¹ . His average speed and average velocity is

1 point

⁴⁄₃ ms⁻¹ , ⁴⁄₃ ms⁻¹

⁴⁄₃ ms⁻¹, 0

8⁄₃ , ⁴⁄₃

0, ⁴⁄₃ ms⁻¹

Clear selection

The position of a body varies with time, x=(t²+t+1)m. Find average velocity between t₁=2sec and t₂=4sec

1 point

4ms⁻¹

3ms⁻¹

7ms⁻¹

Clear selection