Science Exercise Unit 2 Force

1 ) What is force?
A Speed of a moving object
B Friction between two objects
C Change in the shape of an object
D Pushing or pulling action against an object

2) Which of the following activities uses pushing force?
I Throwing a ball
II Pressing a light switch
III Carrying up a box
A) I and II only
B) I and III only
C) II and III only
D) I, II and III

3) Which of the following are the effects of force?
I Changing the shape of an object
II Moving a stationery object
III Making an object move slower
IV Changing the direction an object
A I and II only
B IIII and IV only
C I ,II and III only
D I, II, III and IV only

4) Table 1 shows the condition of surface R, S, T and U.
Surface Condition of surface
R Wet
S Dry
T Greasy
U Dusty
Which surface will produce the smallest friction?
A R
B S
C T
D U

5) Which of the surfaces causes the largest friction?
A Tile
B Sandpaper
C Tar
D Paper

6) What force causes an object to stay in a stationary position?
A Gravity
B A push
C Friction
D A pull

7) The following is a list of sports events
W - Archery
Y - Badminton
X - Throwing the javelin
Z - Bowling
A W only
B W and Y only
C W and Z only
D W, Y and Z only

8 ) What will happen if you flick a stationary marble?
A The shape of the marble changes
B The marble starts to move
C The direction of the marbles changes
D The marble does not move

9) Which of the following situations shows the advantages of frictional force?
I The sole of a shoe wears out
II A car stops when the brake is applied
III A chair can stay permanently at a place
A I and II only
B I and III only
C II and III only
D I, II and III

10) Which of the following is an advantage of friction?

A It produces heat
B It causes wear and tear
C It slows down the movement of an object
D It enables us to walk without falling

Answer of Unit 2
Unit 1
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7