Suppose that the acceleration versus time graph of a particle that starts from rest at t = 0 is as shown in the figure. At what instant does the particle come to rest for the first time?

The particle never comes to rest.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 38 - Motion>SAT 2020>Q 6

MEDIUM

NTSE Stage II

IMPORTANT

Earn 100

A ball is thrown vertically upwards at a speed $u$ and returns to the thrower. There are two instants at which the ball has equal kinetic and potential energies. The difference between these two instants is

100% studentsanswered this correctly

Important Questions on Motion

MEDIUM

NTSE Stage II

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 38 - Motion>SAT 2021>Q 7

A train moving in uniform

90 km {hr}^{- 1}

is approaching a flag station whose platform is

500 m

long. The station master is standing at the centre of the platform. The train starts blowing the whistle when the engine is

1 km

away from the near end of the platform and continues blowing the whistle till engine crosses of the platform without stopping. If the speed of the sound is assumed to be

300 {ms}^{- 1}

, then the duration for which station master hears the whistle is?

EASY

NTSE Stage II

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 38 - Motion>SAT 2021>Q 8

A swimmer can swim in still water at a speed of

15 km {hr}^{- 1}

. A river is flowing at

5 km {hr}^{- 1}

. The swimmer starts from a point and swim

1 km

Upstream and then returns by swimming downstream back to original position. During this, the average speed of his/her swimming is :

MEDIUM

NTSE Stage II

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 38 - Motion>SAT 2021>Q 9

A car P is moving with a uniform speed

72 km {hr}^{- 1}

towards another car Q at rest on a straight level road. At a particular instance when the distance between P and Q is

525 m

the car Q started accelerating at

2 {ms}^{- 2}

towards P. Find the distance travelled by Q, when both the cars meet.

EASY

NTSE Stage II

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 38 - Motion>SAT 2021>Q 10

A body travels the distance

A B = l

with a speed

2 {ms}^{- 1}

. Thereafter, it travels

B C = l'

with speed

1.5 {ms}^{- 1}

and the remaining

C C' = (l - l')

with

0.5 {ms}^{- 1}

. Calculate the average speed for this journey assuming that the body takes the same time in travelling distances

B C

and

C C'

.

Learn and Prepare for any exam you want !

|

|

|

|

|

|

|

|

A ball is thrown vertically upwards at a speed u and returns to the thrower. There are two instants at which the ball has equal kinetic and potential energies. The difference between these two instants is

Important Questions on Motion

Learn and Prepare for any exam you want !

A ball is thrown vertically upwards at a speed $u$ and returns to the thrower. There are two instants at which the ball has equal kinetic and potential energies. The difference between these two instants is