This document discusses various forces including force direction, balanced forces, gravity, weight, friction, and air resistance. It then provides 10 multiple choice questions to test understanding of these concepts. The questions cover topics like which forces are balanced when a tennis player catches a ball, the direction of air resistance when an object falls, units for measuring weight, where one would feel heaviest, properties of gravity, why we don't fall through the ground, characteristics of stationary objects, identifying the direction of different forces in an illustration, and identifying which answer is not a force.

1. Force direction

2. Pull Direction

3. Push Direction

4. Force Direction of Gravity

5. Force Direction of Weight

6. Force Direction of Friction

7. Force Direction of Air Resistance

8. Force Direction of Upthrust

9. Balanced force
If an object stays still, it means
that the object has
balanced force

10. Write and Do following quiz!
Note: please write the question and the correct
answer on your notebook

11. 1. A girl stands still holding a racket on a
tennis court. A ball is coming towards
her. Which two forces are balanced?
A.Her weight and a reaction force from the
ground
B.Her weight and a reaction force from the
ground
C.The force of her opponent's hit on the ball and
air resistance

12. 2. When an object falls, air resistance ....
A.acts in the opposite direction to the
movement
B. acts in the same direction as the weight
C.does not act at all

13. 3. Weight is a force and is measured in ....
A.newtons
B. kilograms
C.metres

14. 4. Where would you feel heaviest?
A. The Earth
B. The Moon
C. You will feel equally heavy on both

15. 5. Which of the following is TRUE?
A. Gravity only acts through air, not through water
or land
B. Gravity does not act on aeroplanes flying in the
sky
C.Gravity always acts towards the centre of the
earth

16. 6. If gravity pulls you towards the centre
of the Earth, why don't you fall through
the pavement?
A.Because gravity doesn't act through
pavements
B. The pavement exerts an equal force in the
opposite direction
C.Because gravity runs out

17. 7. When an object is at rest/stationary ...
A.There are no forces acting on it
B. There are forces acting on it but these
forces are balanced
C.There is just one force acting on it, gravity

18. 8. Study the picture below.
The force direction shown
by the arrow coloured with
red( ) is....
A.Weight
B. Air Resistance
C.Friction

19. 9. Which of these is FALSE?
A.A moving object carries on moving until a
force stops it
B. A moving object eventually runs out of
force and slows down
C.A moving object travels in a line until a
force changes its direction

20. 10. Which of these is not a force?
A.Weight
B. Mass
C.Friction