HARD

9th CBSE

IMPORTANT

Earn 100

Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between $4^{t h}$ and $5^{t h}$ second.

Important Questions on Motion

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 1

100 m

sprinter increases her speed from rest uniformly at the rate of

1 m s^{- 2}

up to

40 m

and covers the remaining distance with a uniform speed. The sprinter covers the first half of the run in

t_{1} s

and second half in

t_{2} s

then:

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 2

Particles

P

and

Q

are undergoing uniform horizontal circular motions along concentric circles of different radii in clockwise sense

P

completes each round in

2 \min

while

Q

does it is

5 \min

time required by

Q

to make one revolution around

P

is :

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 3

You are sitting in a stationary car. There is a helium balloon tied to its floor. You accelerate and obviously feel like you are being pushed backwards (against the direction of your acceleration). The balloon :

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 4

A boy begins to walk eastward along a street in front of his house and the graph of his position from house is shown in the following figure. His average speed for whole time interval is equal to :
Question Image

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 5

A bus is travelling the first one-third distance at a speed of

10 km h^{- 1}

, the next one-fourth at

20 km h^{- 1}

and the remaining at

40 km h^{- 1}

. What is the average speed of the bus?

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 6

A car

A

is travelling on a straight level road with a uniform speed of

60 k m / h

. It is followed by another car

B

. which is moving with a speed of

70 k m / h

. When the distance between them is

2.5 k m

, the car

B

is given a deceleration of

20 k m / h^{2}

. After how much time will

B

catch up with

A

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 7

A sprinter has to cover a total run of

100 m

. She increases her speed from rest under a uniform acceleration of

1 . 0 m / s^{2}

up to three quarters of the total run and covers the last quarter with uniform speed. The time she takes to cover the first half, and to cover the second half of the run will be :

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 8 - Motion>Challengers*>Q 8

A bus begin to move with an acceleration of

1 m / s^{2}

. A man who is

48 m

behind the bus starts running at

10 m / s

to catch the bus. The man will be able to catch the bus after

Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between 4thand 5th second.

Important Questions on Motion

Learn and Prepare for any exam you want !

Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between $4^{t h}$ and $5^{t h}$ second.