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The numerical ratio of displacement to the distance covered is always

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Important Questions on Kinematics

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 53

A particle moves in a straight line for

20

seconds with velocity

3 m s^{- 1}

and then moves with velocity

4 m s^{- 1}

for another

20

seconds and finally moves with velocity

5 m s^{- 1}

for next

20

seconds. What is the average velocity of the particle?

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 54

An object travels

10 km

at a speed of

100 m s^{- 1}

and another

10 km

50 m s^{- 1} .

The average speed over the whole distance is:-

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 55

A point object traverses half the distance with velocity

v_{0} .

The remaining part of the distance is covered with velocity

v_{1}

for the half-time and with velocity

v_{2}

for the rest half. The average velocity of the object for the whole journey is

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 56

Select the incorrect statements from the following.

S 1

: Average velocity is path length divided by time interval.

S 2

: In general, the average speed is greater than the magnitude of the average velocity.

S 3

: A particle moving in a given direction with a non-zero velocity can have zero speed.

S 4

: The magnitude of average velocity is the average speed.

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 57

x

denotes displacement in time

t

and

x = a \cos t

, then acceleration is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 58

The velocity-time relation of an electron starting from rest is given by

u = k t

, where

k = 2 m s^{- 2} .

The distance traversed in

3 \sec

is:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 59

The position

x

of a particle varies with time

(t)

x = {at}^{2} - {bt}^{3} .

The acceleration at time

t

of the particle will be equal to zero, where

t

is equal to:

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Beta Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise (Conceptual Questions)>Q 60

A particle moves along a straight line such that its displacement at any time

t

is given by

s = t^{3} + 6 t^{2} + 3 t + 4

metres. The velocity when the acceleration is zero is:

The numerical ratio of displacement to the distance covered is always

Important Questions on Kinematics

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