Tag: motion, force and speed

Questions Related to motion, force and speed

When a force is exerted on an object without any contact, the force is known as ____

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. contact force

  2. non-contact force

  3. muscular force

  4. none of the above

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Correct Option: B
Explanation:

A force applied on an object without any contact it is non-contact force, Examples are magnetic force, electrostatic force etc.

Which of the following is NOT a non-contact force?

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. Magnetic force

  2. Electrostatic force

  3. Gravitational force

  4. Muscular force

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Correct Option: D
Explanation:

Magnetic force and electrostatic forces are non-contact force as the force applied on an object without any contact with it, similarly, with gravitational force this is force applied without being aware of it and all time.

Muscular force can be applied only while in contact with the object. So, it is a contact force, not a non-contact force.

Unlike poles of two magnets ______ each other.

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. attract

  2. repel

  3. neutralize

  4. exert no force on

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Correct Option: A
Explanation:

Unlike poles of the two magnets attracts each other. the force applied by it is non-contact forces and magnetic force.

Like poles of two magnets _____ each other.

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. attract

  2. repel

  3. exert no force on

  4. neutralize

Show answer
Correct Option: B
Explanation:

Like poles of two magnets repel each other, The force between them is non contact force and magnetic force

When a ball is hit by a bat, forces acting on the ball are

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. muscular force

  2. gravitational force

  3. both A and B

  4. neither A nor B

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Correct Option: C
Explanation:

Being hit by a bat, muscular force acts on the  ball. And, all the bodies on the earth are acted upon by  the gravitational force. So, the ball is acted upon by both muscular and gravitational force.

Gravity is shown by

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. earth only

  2. earth and moon

  3. earth and some selected planets

  4. all objects in the universe

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Correct Option: D
Explanation:

Gravity is not a property of the earth alone. Every object in the universe exerts a force on every other object. This force is known as the gravitational force.

Attraction or repulsion between two objects can also be seen us another form of ____

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. pull or push

  2. pull only

  3. push only

  4. none of the above.

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Correct Option: A
Explanation:

The attraction or repulsion can also be referred as pull or push force between two objects.

The force exerted by a charged body on another charged or uncharged body is known as ______ force.

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. magnetic

  2. electrostatic

  3. gravitational

  4. friction

Show answer
Correct Option: B
Explanation:

Electrostatic force is a exerted by a charged body on another changed or uncharged body.

Gravitational force is a _____ force. 

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. contact

  2. non-contact

  3. magnetic

  4. electrostatic

Show answer
Correct Option: B
Explanation:

Gravitational force is a non-contact force. For action of gravitational force, contact with an object is not required. The force of gravity acts on all object at all the time even while not in contact with the earth.

Attraction and repulsion between charged objects are examples of _______ force.

physics motion, force and speed contact and non-contact forces comparing force in magnetic, electric and gravitational fields identifying forces

  1. non-contact

  2. contact

  3. either contact or non-contact

  4. neither contact nor non-contact

Show answer
Correct Option: A
Explanation:

The attraction and repulsion between charged objects happen due to the action of electrostatic forces. Electrostatic force act between bodies not in contact. So, attraction and repulsion between charged objects are examples of non-contact force.