- Introduction
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- Speed and Velocity
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- acceleration
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- Equations of uniformly accelerated motion
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- Graphical representation of motion
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- Equations of motion by graphical method
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- Uniform circular motion

A train accelerates from 36 km/h to 54 km/h in 10 sec.

(i) Acceleration

(ii) The distance travelled by car.

Answer

A body whose speed is constant

(a) Must be accelerated

(b) Might be accelerated

(c) Has a constant velocity

(d) Cannot be accelerated.

Answer

A truck traveling at 54 km/h is slow down to 36 km/h in 10 sec. Find the retardation

Answer

A particle is moving in a circle of diameter 20m. What is its distance and as per the table given below

S.no | Rounds | Displacement | Distance |
---|---|---|---|

1 | 1 | ||

2 | 1.5 | ||

3 | 2 | ||

4 | 2.5 |

A scooter travelling at 10 m/s speed up to 20 m/s in 4 sec. Find the acceleration of train.

Answer

A train starts from rest and accelerate uniformly at the rate of 5 m/s2 for 5 sec. Calculate the velocity of train in 5 sec.

Answer

A object moves with uniform positive acceleration. Its velocity-time graph will be

(a) A straight line parallel to the time axis

(b) A straight line inclined at an obtuse angle to the time axis

(c) A straight line inclined at an acute angle to the time axis

(d) None of these.

Answer

The maximum speed of a train is 90 km/h. It takes 10 hours to cover a distance of 500 km. Find the ratio of its average speed to maximum speed?

Answer

9 A car start from rest and acquire a velocity of 54 km/h in 2 sec. Find

(i) the acceleration

(ii) distance travelled by car assume motion of car is uniform?

Answer

An object dropped from a cliff falls with a constant acceleration of 10 m/s

Answer

11 A ball is thrown upwards and it goes to the height 100 m and comes down

1) What is the net displacement?

2) What is the net distance?

Answer

Two cars A and B race each other. The Car A ran for 2 min at a speed of 7.5 km/h, slept for 56 min and again ran for 2 min at a speed of 7.5 km/h. find the average speed of the car A in the race.

Answer

Anand leaves his house at 8.30 a.m. for his school. The school is 2 km away and classes start at 9.00 a.m. If he walks at a speed of 3 km/h for the first kilometer, at what speed should he walk the second kilometer to reach just in time?

Answer

An object moves along a straight line with an acceleration of 2 m/s

Answer

A bullet hits a Sand box with a velocity of 20 m/s and penetrates it up to a distance of 6 cm. Find the deceleration of the bullet in the sand box. Question 16

A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance D

(a) D

(b) D

(c) D

(d) D

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Class 9 Maths Class 9 Science