Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 10

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Between two stations a train accelerates uniformly at first, then moves with constant speed and finally; retards uniformly to come to rest. If the ratios of time taken are $1 : 8 : 1$ and the greatest speed is $60 km h^{- 1}$ , then the average speed over the whole journey is

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 11

A ball is thrown vertically upwards with a velocity of

30 {ms}^{- 1}

. If the acceleration due to gravity is

10 {ms}^{- 2}

, what will be the distance travelled by it in the last second of motion before again come to his hand:

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 12

Two balls are dropped from different heights. One ball is dropped

2 \sec

after the other but they both strike the ground at the same time,

3 \sec

after the first is dropped. The difference in the heights at which they were dropped is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 13

Two bodies are thrown vertically upward, with the same initial velocity of

98 m s^{- 1}

but

4 s

apart. How long after the first one is thrown when they meet?

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 14

A particle moves with constant speed

v

along a regular hexagon

A B C D E F

in same order. (i.e.

A

to

B, B

to

C, C

to

D, D

to

E, E

to

F

and

F

to

A

). The magnitude of average velocity for its motion from

A t o C

is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 15

A ball is dropped from a height of

20 m

and rebounds with a velocity which is

\frac{3}{4}

th of the velocity with which it hits the ground. What is the time interval between the first and second bounces

(g = 10 m s^{- 2})

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 16

The velocity displacement graph of a particle moving along a straight line is shown.

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The most suitable acceleration-displacement graph will be

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 17

An electron starting from rest has a velocity that increases linearly with time i.e.,

v = k t

, where

k = 2 {ms}^{- 2} .

The distance covered in the first

3

second is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-2>Q 18

A body is moving from rest under constant acceleration. Let

S_{1}

be the displacement in the first

(p - 1) \sec

and

S_{2}

be the displacement in the first

p \sec

. The displacement in

{(p^{2} - p + 1)}^{th} \sec

will be