Question

ASSESSMENT ZONE
A. Choose the correct answer.
1. Which of the following force is a contact force?
a. Gravitational force
c. Frictional force
b. Magnetic foro
d. Electrostatic force
2. Two objects repel each other. The repulsion could be due to
a magnetic force
c. gravitational force
b. electrostatic force
at both (a) and (b)
3. Which of the following is not a unit of pressure?
a. Pa
b. kg/m
C. N/m
d. atm
4.
In which direction is liquid pressure always directed?
a. Upwards
c. Both (a) and (b)
( 5
5. What is the value of atmospheric pressure at sea level?
a. 76 mm column of mercury
b. 76 cm column
d Both (b) and
b. Downwards
d. All directions​

Answer 1

1. C. Frictional force - It is the force generated by two surfaces that contact and slide against each other.

2. D. Both (a) and (b) - When there is a repulsive force between two objects, it could be due to an electrostatic or magnetic force.

3. B. Kg/m

4. All directions

5. A. 76 mm Hg