Class IX_Speed, Velocity and Acceleration

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Class IX_Speed, Velocity and Acceleration_May 2020

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The S.I unit of speed and velocity? *

1 point

meter

meter/sec

m/s2

Name the quantity that represents rate of displacement. *

1 point

speed

acceleration

velocity

Which of the following statement is correct regarding velocity and speed of a moving body?

1 point

Velocity of a moving body is always higher than its speed.

speed of a moving body is its velocity in a given direction.

Velocity of a moving body is its speed in a given direction.

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The car is moving with a speed of 126 km/hr.This speed is equal to :

1 point

35m/s

40 m/s

15m/s

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Total distance traveled divided by total time is equal to *

1 point

momentum

average velocity

average speed

Speed of sound in water 1500m/sec. Find the depth of water when reflected sound waves are detected after 0.40 sec. *

1 point

700 m

600Km

600m

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

1 point

7m/s^2

7.5 m/s^2

10 m/s^2

A bus travelling eastwards at 60 m/s takes 10s to come to halt,its deceleration equal to *

1 point

6 m/s

-6 m/s

6 m/s^2

If Acceleration is written as -5 m/s^2, how we can write retardation(deceleration) in the same case *

1 point

5 m/s^2

-5 m/s^2

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