7.
are those types of forces that result when the two interacting objects are perceived to be physically contacting each other.

a. gravitational
b. contact
c. field
d. at-a-distance

Contact are those types of forces that result when the two interacting objects are perceived to be physically contacting each other.

Option B

Explanation:

A contact force is any force that requires contact to occur. Kick a ball or push a desk in a room, driving a car up a hill, are the best daily life examples. Here, the question itself says “contacting”. So, undoubtedly, it is contact forces.

The toy moves because a force is continuously applied by someone on the toy, while in the second case, the given force is applied in the form of impulse. Another contact force, we can simply understand is frictional force.

a person with a mass of 106kg has a weight of 1060n

temp rises, and expansion