SCIENCE QUIZ CLASS 9 FORCE

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

• (a) Heat

• (b) Pressure

• (c) Force

• (d) Density

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

• (a) 1N

• (b) 10N

• (c) 100N

• (d) 1000N

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

• (a) Velocity

• (b) Acceleration

• (c) Speed

• (d) Displacement

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) Velocity

• (b) Acceleration

• (c) Speed

• (d) Inertia

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

• (a) Newton

• (b) Physical balance

• (c) Spring balance

• (d) Pan balance

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

• (a) Unbalanced force

• (b) Balanced force

• (c) Centrifugal force

• (d) Centripetal force

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

• (a) Due to the gravity of the earth.

• (b)Due to the size of the earth

• (c) Due to the mass of the earth

• (d) Due to the speed of the air .

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

• (a) 1^st law of motion

• (b) )2^nd law of motion

• (c) ) 3^rd law of motion

• (d) ) 4^th law of motion

Which one is the rate of change of displacement ?

• (a) Speed

• (b) Velocity

• (c) Acceleration

• d) Motion

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

• (a) Weight of our body .

• (b) Gravitational force

• (c) Mass of our body

• (d) Acceleration due to gravity