Free Printable SCIENCE QUIZ CLASS 9 FORCE

1.

A physical quantity that changes or tends to change the state(rest/motion) of an object is called:

a)

(a) Heat

b)

(b) Pressure

c)

(c) Force

d)

(d) Density

2.

How much force is needed to produced 1m/s² acceleration on 1 kg mass of body?

a)

(a) 1N

b)

(b) 10N

c)

(c) 100N

d)

(d) 1000N

3.

The rate of change of velocity in unit time is called:

a)

(a) Velocity

b)

(b) Acceleration

c)

(c) Speed

d)

(d) Displacement

4.

In the absence of external force, the tendency of a body to remain in its on state rest or in uniform motion is called as :

a)

(a) Velocity

b)

(b) Acceleration

c)

(c) Speed

d)

(d) Inertia

5.

A device used to measure the weight of the body is :

a)

(a) Newton

b)

(b) Physical balance

c)

(c) Spring balance

d)

(d) Pan balance

6.

A force that does not produce motion in a body is known as:

a)

(a) Unbalanced force

b)

(b) Balanced force

c)

(c) Centrifugal force

d)

(d) Centripetal force

7.

By which reason behind that Atmosphere does not escape away from the earth?

a)

(a) Due to the gravity of the earth.

b)

(b)Due to the size of the earth

c)

(c) Due to the mass of the earth

d)

(d) Due to the speed of the air .

8.

Which Newton’s law of motion is also known as law of inertia ?

a)

(a) 1^st law of motion

b)

(b) )2^nd law of motion

c)

(c) ) 3^rd law of motion

d)

(d) ) 4^th law of motion

9.

Which one is the rate of change of displacement ?

a)

(a) Speed

b)

(b) Velocity

c)

(c) Acceleration

d)

d) Motion

10.

Which of the following is the independent of the mass of the earth?

a)

(a) Weight of our body .

b)

(b) Gravitational force

c)

(c) Mass of our body

d)

(d) Acceleration due to gravity

11.

A speed of 72 km/h into m/s becomes :

a)

(a) 10 m/s

b)

(b) 20 m/s

c)

(c) 30 m/s

d)

(d) 40 m/s

12.

If the earth stops rotating about its axis , then the value of “g” will :

a)

(a) Decrease

b)

(b) Increase

c)

(c) Remains unchanged

d)

(d) none of them

13.

Which one is wrong ?

a)

(a) u² = v²- 2as

b)

(b) v² = u² + 2as

c)

(c) s = ut +1/2gt²

d)

(d) v = u – at

14.

F = ma is belongs to :

a)

(a) 1st law motion

b)

(b) 2^nd law of motion

c)

(c) 3^rd law of motion

d)

(d) none of them

15.

In the equation F = ma, what does m represent?

a)

(a) Mass

b)

(b) Meters

c)

(c) Momentum

d)

(d) Moment

16.

Which of the following is not wrong about force?

a)

(a) Force is product of mass and distance .

b)

(b) CGS unit of force is dyne.

c)

(c) SI unit of force is not newton(N) .

d)

(d) Force is scalar quantity.

17.

If acceleration or deceleration is zero, force acting on it are

a)

(a) balanced

b)

(b) unbalanced and add up to zero

c)

(c) unbalanced

d)

(d) balanced but would not add up to zero

18.

A ball is thrown vertically upwards . What is its momentum at the highest points?

a)

(a) 9.8 kg.m/s

b)

(b) 0 kg.m/s

c)

(c) 0 kg.m/s²

d)

(d) 9.8 m/s²

19.

How much force needed to accelerate 1 kg of masses at the rate of 1m/s²?

a)

(a) 10 N

b)

(b) 9.8 N

c)

(c) 1 N

d)

(d) 100 N

20.

Which one is the vector quantity of the following?

a)

(a) time

b)

(b) mass

c)

(c) velocity

d)

(d) pressure

21.

Mass is known as scalar quantity because:

a)

(a) it has direction only

b)

(b) it has magnitude only

c)

(c) it has direction & magnitude both.

d)

(d) speed is not scalar quantity

22.

Force due to pull of gravity is called

a)

(a) Weight

b)

(b) Pressure

c)

(c) Mass

d)

(d) Tension

23.

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

a)

(a) 6 m/s eastward

b)

(b) -6 m/s eastward

c)

(c) 6 m/s² eastward

d)

(d) -6 m/s² eastward

24.

1 newton is not equal to :

a)

(a) 10⁵ dynes.

b)

(b) 1 kg m/s²

c)

(c). 1 J/s.

d)

(d) 1 J/m.

25.

A car of mass 1000kg can produce an acceleration of 2.5 m/s². Calculate the force produced by the engine. (ignoring friction.)

a)

(a) 50N.

b)

(b) 250N.

c)

(c) 2500N.

d)

(d) 25000N

26.

If a bus started suddenly the passengers in the bus will tend to fall:

a)

(a) the direction of motion of the bus.

b)

(b) the opposite direction of motion of the bus.

c)

(c) left side.

d)

(d) right side.

27.

An object is thrown vertically upward with velocity “u”, the greatest height is “h” , then “h” is calculated by :

a)

(a) u/2g.

b)

(b) u²/2g.

c)

(c) 2g/u²

d)

(d) u²+2g

28.

The inertia of moving object depends on:

a)

(a) Mass of an object

b)

(b) Shape of an object.

c)

(c) Speed of object.

d)

(d) Momentum of an object

29.

Newton’s 1^st law of motion gives the concept of :

a)

(a) Momentum

b)

(b) Inertia

c)

(c) Energy

d)

(d) power

30.

Force depends upon :

a)

(a) Mass and time

b)

(b) Mass and acceleration

c)

(c) Time and velocity

d)

(d) Only mass

31.

The distance covered by a body in a fixed direction is called

a)

(a) Velocity

b)

(b) Acceleration

c)

(c) Speed

d)

(d) Displacement

32.

Who is he?

a)

Student

b)

Teacher

c)

Trainer

d)

Facilitator

SCIENCE QUIZ CLASS 9 FORCE

Total questions: 32

Worksheet time: 16mins

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