Tag: force and newton's laws of motion

Questions Related to force and newton's laws of motion

A horse tied to a cart is standing stationary on road. Which of the following statement is CORRECT?

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. Horse is applying force on the cart

  2. Cart is applying force on the horse

  3. Force applied by the horse is balanced by the force applied by the cart

  4. No forward force is being applied by the horse or the cart

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Correct Option: D
Explanation:

The horse tied to cart is standing stationary on road denotes that the net force acting on the horse as well as the cart individually is zero. If it is standing stationary, it means that horse is applying force on the road perpendicularly and road is also applying same magnitude of force in the opposite direction, which makes the net force on horse to be zero and hence no forward force on the horse is there.

A coin flicked across a table will stop, because:

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. it is heavy

  2. no force is acting on it

  3. earth attracts the coin

  4. table exerts a frictional force

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Correct Option: D
Explanation:

The table exerts a frictional force on the coin in the reverse direction and thus the coin stops across the table.

Which law of Newton defines an ‘inertial frame of reference’?

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. First law of motion

  2. Second law of motion

  3. Third law of motion

  4. Law of gravitation

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Correct Option: A
Explanation:

First Law of Newton states that when viewed in an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity unless acted upon by an external force.

A particle is moving with a constant speed along a straight line path. A force is not required to:

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. Increase its speed

  2. Decrease its momentum

  3. Change the direction

  4. Keep it moving with uniform velocity

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Correct Option: D
Explanation:

Newton's first law of motion states that if an object experiences no net force, then its velocity is constant. So, force is not required to keep object moving with uniform velocity.

Newton's first law of motion is also called Galileo's law of:

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. Conservation of momentum

  2. Inertia

  3. Friction

  4. Conservation of mass

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Correct Option: B
Explanation:

Newton's first law of motion states that the object tends to remain in the initial state untill no external force is applied to it which is also called Galileo's law of inertia.

When a body is stationary :

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. there is no force acting on it

  2. the combination of forces acting on it balance each other

  3. the force acting on it are not in contact with it

  4. the body is in vacuum

Show answer
Correct Option: B
Explanation:

For the body to be stationary, net external force acting on it must be equal to zero which is possible only when the combination of forces acting on it balance each other.

Which law is involved in the act of cleaning a carpet by beating it with a stick ? 

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. First law of motion.

  2. Second law of motion

  3. Law of conservation of energy

  4. Law of conservation of mass

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Correct Option: A
Explanation:

The dust particles get separated out from the carpet by beating it with a stick due to their inertia of rest which is explained by Newton's first law of motion.

Idea of inertia came from:

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. Newton's third law of motion

  2. Newton's second law of motion

  3. Newton's first law of motion

  4. Law of gravitation

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Correct Option: C
Explanation:

Newton's first law of motion states that the body tends to remain in the initial state if no external force is applied to it which gave the idea of inertia.

Newton's law of motion were stated by the scientist named as Charles-Augustin 

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. True

  2. False

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Correct Option: B
Explanation:

Newton's laws of motion published in $1687$ by the scientist $Issac$ $Newton$ in his Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy).

Why is it advised to tie any luggage kept on the roof of a bus with a rope?

physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

  1. While the bus is moving, luggage tends to remain in inertia of motion state

  2. When the bus stops, the luggage tends to resist the change and due to inertia of motion it move forward and may fall off

  3. Both a and b are true

  4. None of them is True

Show answer
Correct Option: C
Explanation:

While the bus is moving, luggage tends to remain in inertia of motion state. When the bus stops, the luggage tends to resist the change and due to inertia of motion it moves forward and may fall off. That's why it is advised to tie any luggage kept on the roof of a bus with a rope.