Answer:

TO FIND THIS WE HAVE TO FIRST FIND BREADTH

BREADTH-AREA/LENGTH

B-21/3

-7CM BREADTH

NOW PERIMETER-2*(l+b)

2*(7+3)

2*10

20cm

answer 20 cm

Verified answer

Answer:

Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction.

Frictional Force: Gravitational Force

Normal Force: Magnetic Force

Tension Force: Electrical Force

Contact Forces: Action-at-a-Distance Forces

Step-by-step explanation:

why sorry