Tag: introduction to force

Questions Related to introduction to force

When a spring is pulled :

physics force and types of force introduction to force what is force? concept of force and its unit

  1. shape of the spring changes

  2. size of the spring changes

  3. size of the spring doesn't change 

  4. both a and b

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Correct Option: D
Explanation:

When a spring is pulled, it's shape and size changes. When a force is applied on a soft object,it changes the shape and size of the object.

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physics force and types of force introduction to force what is force? concept of force and its unit

  1. Force can be seen

  2. When an inflated balloon is pressed between the two hands,only its shape changes

  3. Force is a push,pull or squeeze

  4. All

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Correct Option: C
Explanation:

Force cannot be seen.we can 'see' or 'feel' the force through its effects.when an inflated balloon is pressed between the two hands,its shape and size changes.

Force acting on a body is a push,pull or a squeeze.

As longer the interaction between two objects exist

physics force and types of force introduction to force what is force? concept of force and its unit

  1. The force remains

  2. The force stops after the initial interaction

  3. Both a and b

  4. The force remains for a specific time interval 

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Correct Option: A
Explanation:

A force is a push or pull on an object. This push or pull comes from the objects interacting with one another and only from such interactions. Once the interaction stops, there is no longer any force.

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physics force and types of force introduction to force what is force? concept of force and its unit

  1. A force can make stationary object move.

  2. A force can stop a moving object

  3. A force can increase the speed of a moving object

  4. All

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Correct Option: D
Explanation:

Force acting on a body can change its state of rest or of motion.

A force can make a stationary object move-when you kick a stationary football,it moves.

A force can stop a moving object-when a force is applied on a moving object in the direction of motion,its speed increases.

 Fill in the blank.

Interaction of one object with ________ results in a force.

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Itself

  2. Another object

  3. Both

  4. May itself and may be another object 

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Correct Option: B
Explanation:

$Answer:-$ B

Best example we can take into account is gravitational force.
Gravitation or gravity, is a natural phenomenon by which all things with mass are brought toward  one another, including planets, stars and galaxies.
And for that attraction force is responsible known as gravitational force.

Which of the following is/are correct

physics force and types of force introduction to force what is force? concept of force and its unit

  1. At least two objects must interact for a force to come into play.

  2. Interaction of one object with another object results in a force between the two objects.

  3. Interacting forces may be push or pull

  4. All

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Correct Option: D
Explanation:

We can infer that at least two objects must interact for a force to come into play.Thus,an interaction of one object with another object results in a force between the two objects.

A force between two objects come into play when

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Both objects are very heavy

  2. Both objects move with some speed

  3. Both objects interact with each other

  4. All

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Correct Option: C
Explanation:

At least two objects must interact for a force to come into action.

An interaction of one object with another object ,results in a force between the two objects.

Pulling of a cart/tram is an example of

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Resultant force

  2. Gravitational force

  3. Contact force

  4. Action at a distance force

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Correct Option: C
Explanation:

The contact forces represent the result of physical contact between two objects,one by which force is exerted and the other on which force is exerted.

Suppose a man is standing behind a stationary car.Which of the following options will be correct?

physics force and types of force introduction to force what is force? concept of force and its unit

  1. The car will start moving towards the man

  2. The car will start moving away from the man

  3. The car will not move at all

  4. None

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Correct Option: C
Explanation:

Forces are due to an interaction.So the car will only move on application of force.

This S.I. unit of force is____

physics force and types of force introduction to force what is force? concept of force and its unit

  1. Joules

  2. Newton

  3. Watt

  4. Dyne

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Correct Option: B
Explanation:

F = ma

unit wise, $  \dfrac{kg m}{s^2} $
This is defined as Newton.
So, option B is correct.