Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

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

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

  1. contact force

  2. non-contact force

  3. muscular force

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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

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

  1. Magnetic force

  2. Electrostatic force

  3. Gravitational force

  4. Muscular force
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. muscular force

  2. gravitational force

  3. both A and B

  4. neither A nor B
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Gravity is shown by

  1. earth only

  2. earth and moon

  3. earth and some selected planets

  4. all objects in the universe
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Gravitational force is a _____ force. 

  1. contact

  2. non-contact

  3. magnetic

  4. electrostatic
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. non-contact

  2. contact

  3. either contact or non-contact

  4. neither contact nor non-contact
Reveal answer Fill a bubble to check yourself
A Correct answer
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.