Grade 8 CBSE Force and Pressure science – test 1

1. A push or a pull on an object is called:
A. Pressure           B. Force
C. Gravity             D. Magnetism

2. Which not true about gravity?
A. Gravitational acceleration is 9.8 m/s²
B. Gravitational force is attractive in nature
C. It is a non-contact force
D. It can repel as well

3. Choose the odd one out:
A. Frictional force
B. Gravitational force
C. Electrostatic Force
D. Magnetic force

4. When two objects repel each other, it can be due to:
A. Electrostatic force
B. Magnetic force
C. Both a and b
D. Either a or b

5. Choose the odd one out:
A. Dolphin swimming in the sea
B. Girls playing badminton
C. Separating iron fillings from sand
D. Drawing a bucket of water from the well

Type A/B/C/D 
1.
2.  
3. 
4. 
5. 

6. Which statement is incorrect?
A. Electrostatic forces come into play when at least one body is charged
B. Magnetic force acts on metals and non-metals
C. Gravitational force is an attractive pull every object exerts on every other object
D. Muscular force exerted by the intercostal muscles in our chest help us breath

7. The strength of a force exerted is called:
A. Pressure
B. Force
C. Area
D. Magnitude

8. Which force always acts in the direction opposing the motion of an object?
A. Muscular force
B. Frictional force
C. Electrostatic force
D. Magnetic force

9. Which of the following statements is incorrectwhen force is exerted on a stationary body?
A. It can change the speed of the body
B. It can change the shape and size in other words deform the body
C. It can set the body in motion
D. It can reshape the body

10. The state of a body can be described as follows:
A. At rest
B. In motion
C. Both a and b
D. Only b

11. In a tug of war competition, the winning group is determined by calculating the net force as:
A. Sum of the forces exerted by both the teams
B. Dividing the force by the area
C. Difference in the number of people on either side
D. Difference of the forces exerted by each team

12. Batman and Joker are locked in an hand-to-hand combat. Joker is trying to push Batman off the Gotham bridge, but Batman is not falling because:
A. Batman is applying greater force than Joker
B. Both are pushing each other with equal force and hence the net force is 0
C. Joker is not strong enough and is distracted by Batman’s words
D. Batman is the Hero, so he will never lose

13. The force exerted by an object of mass 1 kg is:
A. 1 ×0.98 N
B. 10 ×9.8 N
C. 9.8 ×1 N
D. 98 ×1 N

14. Lightning striking a tree or a building during a storm is and example of:
A. Electrostatic force
B. Gravitational force
C. Magnetic force
D. Frictional force

15. What does a spring balance measure?
A. Pressure exerted by a body
B. Surface area of a body
C. Weight of a body due to gravity
D. Pressure of a liquid in a container

Type A/B/C/D 
11.
12.  
13. 
14. 
15.