What is the magnitude of the resultant force when two forces act in same direction?


When two forces act in the same direction, the resultant force increases. The magnitude of one adds up with the magnitude of second one. 

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Define 'force'.


A push or pull on an object is called Force. That is an external force acting on the body is called force. 

Force can act to either change the state of an object or its shape. 

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What is the requirement for a force to come into play?


Interaction of one object with another object results in force between the objects. That is, interaction is the factor which is essential for force to act. 

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Match the following option:

A. Contact force (i) Non-contact force
B. Force (ii) Force on unit area
C. Gravity (iii) Push or Pull
D. Gravity (iv) Muscular force
E. Pressure (v) Strength of force

A.

Contact force

(i)

Push or Pull

B.

Force

(ii)

Muscular force

C.

Gravity

(iii)

Strength of force

D.

Gravity

(iv)

Non-contact force

E.

Pressure

(v)

Force on unit area

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Name the type of forces involved in the following :

(a) A ball launched in air hitting the ground 

(b) A bicycle coming to rest when pedalling is stopped.

(c) A horse pulling a cart

(d) A plastic comb rubbed in dry hair picking up tiny pieces of paper

(e) A sticker attached on a refrigerator without glue


The types of forces in the given cases are:-

(a) Force of Gravity 

(b) Frictional force

(c) Muscular force

(d) Electrostatic force

(e) Magnetic force. 

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