Force Class 7

Newton's laws of motion

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Force is a push or pull acting on an object or energy as an attribute of physical action or movement. According to the universal law of gravitation, every object in this universe exerts a force on others. In physics, motion is defined as the change in position with respect to time, change in speed, or change in direction.

Question 01

1.Force exerted on a body changes it's

Direction of motion

Mass

Colour

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01

Question 02

Motion can either be described as

Change in colour

Change in temperature

Change in speed

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Question 03

Who was first person to discover laws of motion

Isaac Newton

Galileo Galilei

Albert Einstein

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Every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This tendency to resist changes in a state of motion is inertia.

Question 01

Newton's first law is also called as

Law of energy

Law of inertia

Law of moment

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Newton’s first law of motion implies that things cannot start, stop, or change direction all by themselves, and it requires some force from the outside to cause such a change

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Question 02

When a car makes a sharp turn at high speed, we slip to one side of the seat. This is because of

Gravitational force

Frictional force

Inertia of body

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Question 03

When a hanging carpet is beaten with a stick, dust particles start coming out. This is an example of

Newton's third law

Newton's first law

Newton's second law

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Newton’s second law states that, the acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body.

Question 01

Which of the equation is correct

a = Fm

F = ma

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Level 03

Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

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Question 02

What is the force applied on a body with 5 kg of mass and an acceleration of 7 m/s2?

35 N

5N

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Question 03

If the force acting on a body is 50 N, and the mass is 5 kg, what can be the acceleration of the body?

10 m/s2

8 m/s2

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Third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A

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Level 4

Question 01

When we jump out of the boat standing in still water, the boat moves

Forward

Backwards

stands still

Sideways

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04

Question 02

The gun recoils after firing a bullet due to

Newton’s First Law

Escape Velocity

Newton’s Third Law

Conservation of Energy

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Question 03

A man is at rest on perfectly smooth ice in the middle of a pond. By applying law can he get to the shore?

Newton’s third Law

Newton’s First Law

Law of conseration

Newton’s Second Law

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Certificate of Completion

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