Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 56

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Two cars $A$ and $B$ are moving in same direction with velocities $30 m s^{- 1}$ and $20 m s^{- 1} .$ When car $A$ is at a distance $d$ behind the car $B,$ the driver of the car $A$ applies brakes producing uniform retardation of $2 m s^{- 2} .$ There will be no collision when

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Important Questions on Motion in a Straight Line

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 57

Two trains each of length

100 m

moving parallel towards each other at speed

72 km h^{- 1}

and

36 km h^{- 1}

respectively. In how much time will they cross each other?

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 58

A ball is dropped from the top of a building of height

80 m .

At same instant another ball is thrown upwards with speed

50 m s^{- 1}

from the bottom of the building. The time at which balls will meet is

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 1

A car travels with speed,

3 m s^{- 1}

for the first half distance of the journey and with speed,

6 m s^{- 1}

for the remaining half. What is the average speed of the entire journey?

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 2

A car travels from

A

to

B

at a speed of

40 km h^{- 1}

and returns back on the same track at a speed of

60 km h^{- 1} .

Average velocity will be

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 3

A particle starts from rest and accelerates constantly with

a m s^{- 2}

for

T

second and then retards uniformly with the same rate till it comes to rest. The position-time

(x - t)

graph of the particle is best represented by

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 4

An athlete completes one round of a circular track of radius

R

in

20 s

with constant speed. What will be his displacement at the end of

1

minute

10

second?

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 5

The numerical ratio of displacement to the distance covered is always

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Gamma Question Bank for Medical Physics>Chapter 3 - Motion in a Straight Line>Assignment>Q 6

A particle moves for

20 s

with speed

6 m s^{- 1}

and then speed

8 m s^{- 1}

for another

20 s

and finally moves with speed

10 m s^{- 1}

for next

20 s .

What is the average speed of the particle?