PHYSICS-CLASS 8

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PHYSICS-CLASS 8

CLASS TEST-LESSON 2-MOTION SCORE:20

GTHS ADIMALI *

NAME OF THE STUDENT *

NAME OF THE SCHOOL *

NAME OF THE DISTRICT *

IDUKKI

OTHERS

1.The object to with respect to which the states of rest or uniform motion of a body is described *

1 point

Reference object

Speed

Displacement

velocity

none of these

2.Which of them is not related to others? *

1 point

Acceleration

Speed

Displacement

Velocity

Retardation

3.-------------is the length of the path travelled *

1 point

Acceleration

Speed

Displacement

Velocity

distance

4.Unit of acceleration is , *

1 point

m/s²

Displacement

msᐨ¹

m/s

5.The rate of change of decrease in velocity is called -------- *

1 point

displacement

uniform velocity

acceleration

retardation

uniform speed

6.The numerical ratio of displacement to distance for a moving object is: *

1 point

Always less than 1

Equal to 1 or more than one

Displacement

Always more than 1

distance

7.Acceleration is a vector quantity, which indicates that its value *

1 point

Is always positive

Can be positive, negative or zero

Is zero

Is always negative

none of these

8.An example of a body moving with constant speed but it has accelerationis ,while it is , *

1 point

Moving with constant speed on a straight road

Moving with uniform speed on a straight railway track

Moving in a helical path with constant speed

Moving with uniform speed in a circular path

9.A bus has covered 70 m in 10 seconds.Find the speed of the bus? *

1 point

7m/s

6m/s

8m/s

10 m/s

10.Calculate the speed and velocity of the object travelling along the path ABC *

1 point

7m/s,10 m/s

10 m/s ,7m/s

6m/s, 7 m/s

10 m/s,4 m/s

6 m/s,4 m/s

11. An object travels 40m in 5 sec and after that it travels another 80m in 5 sec. What is the average speed of the object? *

1 point

16 m/s

2 m/s

5 m/s

40 m/s

12 m/s

12.A bus has covered 80 m in 5 s find the speed? *

1 point

16 m/s

2 m/s

5 m/s

40 m/s

12 m/s

13.If a body is said to be in uniform velocity which of the following will be equal. *

1 point

A.direction

B. quantity

C. direction need not be equal

D. quantity need not be equal

Both and A and B would be equal

none of these

14.What is the acceleration of a car which started from rest and acquired a velocity of 40 m/s in 8 s? *

1 point

5 m/s²

40 m/s²

8 m/s²

12 m/s²

32 m/s²

none of these

15.A car covered the first 400 m distance with a speed of 8 m/s, the next 1200 m with a speed 10 m/s and the last 360 m with a speed of 12 m/s. Calculate the average speed of the car. *

1 point

5 m/s

9.5 m/s

8 .5 m/s

12 m/s

9.8 m/s

none of these

16.In which of the following situation an object has acceleration *

1 point

object travelling along a straight line with uniform velocity.

object travelling along a circular path with uniform speed.

object travelling along a straight line with non-uniform velocity.

object travelling along a straight railway track with uniform velocity.

none of these

17.What is the displacement of a car in 30 s if it is travelling with a velocity of 15 m/s? *

1 point

450m

330 m

150 m

15 m/s

300m/s

18.Observe the figure in which a child travelled from A to B and returned from B to A his displacement is the distance from , *

1 point

A to B through C

A to B

B to A through C

ACB

BCA

B to A

Zero

19.A car is travelling with with a velocity 50m/s. while applying brake the car stops after 20 seconds, calculate the retardation of the car. *

1 point

-20 m/s

-5 m/s²

-2.5 m/s²

2.5 m/s²

+5 m/s²

Zero

20.Which of the following represents the situation having uniform velocity *

1 point

Travelling of light

Travelling of bus

Falling of coconut from a coconut tree.

Rolling of wheel on a slope.

A train starting from the station.

Beena KA

GTHS ADIMALY

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