Tag: force and newton's laws of motion

Questions Related to force and newton's laws of motion

A tennis ball and a cricket ball, both are stationary. To start motion in them

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. a less force is required for the cricket ball than for the tennis ball

  2. a less force is required for the tennis ball than for the cricket ball

  3. same force is required for both the balls

  4. nothing can be said

Show answer
Correct Option: B
Explanation:

According to Newton's laws of motion, an object with more mass requires more force to change the current state. Since, a cricket ball is heavier than a tennis ball, therefore, less force is required to start motion in tennis ball than in cricket ball.

The tendency of a body to resist acceleration is called:

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. Force

  2. Retardation

  3. Inertia

  4. mass

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Correct Option: C
Explanation:

Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. It is the tendency of objects to keep moving in a straight line at constant velocity.

The term mass refers to the same physical concept as:

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. weight

  2. inertia

  3. force

  4. acceleration

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Correct Option: B
Explanation:

The mass can be described as inertia of object which resist its changes in state of motion and rest. Hence correct answer is B.

The mass of an object is a $\underline{                     }$ measure of inertia:

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. quantitative

  2. qualitative

  3. absolute

  4. average

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Correct Option: A
Explanation:

The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.

Who proposed the concept of Inertia ? 

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. Gallileo

  2. Newton

  3. Pascal

  4. Einstein

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Correct Option: A
Explanation:

Galileo Galilei first proposed the concept of inertia. Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Inertia of a body depends on:

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. Mass of the body

  2. Velocity of the body

  3. Acceleration of the body

  4. Energy of the body

Show answer
Correct Option: A
Explanation:

Factors on which inertia of a body depend are:
(1) Mass
(2) Axis of rotation

State whether given statement is True or False.
A five rupees coin has more inertia than a one-rupee coin.

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Mass of a body is the measure of its inertia i.e., more the mass, more is the inertia. Keeping this in mind:
Five rupees coin has more inertia.

Which of the following has more inertia. A rubber ball or a stone of the same size?

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. rubber ball

  2. stone

  3. both have same intertia

  4. cannot be determined

Show answer
Correct Option: B
Explanation:

A stone.
Inertia is associated with mass. Objects having more mass have more inertia.

State whether given statement is True or False.
An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity?

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Yes, when external unbalanced force on an object is zero, the object can travel with a non-zero velocity. Such a motion will be a uniform motion. The conditions for this are:
(i) Magnitude of velocity must be constant.
(ii) Direction of velocity must be constant i.e., it travels in a straight line without change in direction.

The inertia of a moving body makes it:

physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. stop due to friction

  2. increase its speed

  3. decrease its speed

  4. resist a change in its state of motion

Show answer
Correct Option: D
Explanation:

Inertia is a physical property that offers resistance to change in the state of motion of an object i.e an object tends to remain in its initial state of motion when no external force is applied to it.