Question

11. Force is an external effect in the form of a push or pulls which
a) produces or tries to produce motion in a body at rest
c) changes or tries to change the direction of motion of the body
c) both
b) stops or tries to stop a moving body
d) all the above​

Answer 1

Answer:

When force is applied in the direction of motion it increases velocity,

when applied opposite to the direction of motion it will try to reduce the velocity.

when force is applied at any angle with velocity of object, it will try to give a component in that direction where force is applied hence direction or magnitude of net velocity is changed.

When force is applied to any body, an acceleration is generated in that direction where force is applied.

Explanation:

I hope it will help you

Answer 2

• Required Answer

• Force is an external effect in tue form of a push or pull which.

d) All of the above.

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Force - It is an external push or pull which may impart motion, bring the body at rest or change the direction of the body.

• Its S.I. unit is newton (N).
• It is a vector quantity.

Effects of force -

• It can move a body which was at rest.
• It can stop a moving body.
• It can change the speed of the body.
• It can change the size and shape of the body.

By Newton's second law of motion, which states that force is equal to the mass of the object and acceleration of the body. We can calculate force -

F = ma

where,

• F = force
• m = mass of the body
• a = acceleration