Question

1.Which of the following is a contact force

a) Magnetic force

b) Muscular force

2.The pressure will ___________ if you move upward in a liquid

a) Decrease

b) Increase

3.Which of the following is a short range force

a) magnetic

b) electrostatic​

Answer 1

Answer:

Explanation:

1) MUSCULAR FORCE

2) INCREASE

3) ELECTROSTATIC

Answer 2

Answer:

1. b) Muscular force

2. a) decrease

3. b) electrostatic

Explanation:

1. Muscular force is a contact force. Since it is the force applied using parts of the body like arms or legs. This force results due to the action of muscles, so it is a contact force.

2. The pressure inside a liquid depends on the depth of the liquid. i.e. at depth h from the liquid surface, the pressure will be p = d g h where d is the density of liquid and g is the acceleration due to gravity.  so if someone moves upward in a liquid the pressure will decrease.

3. Electrostatic force is a short-ranged force because it is produced by rubbing. So it is a very weak force.