Force and Pressure Worksheet-6

Force and Pressure Worksheet-6

1. A box was pushed over an equal distance on four different surfaces. The force needed for each surface was recorded in the table below.

On which surface was the friction least?

(a) P                    (b) Q                   (c) R                    (d) S

2. John and Peter go to the amusement park to play the pin ball game. The figure shows the extent to which each of them pulls the striker. Which one of the following statements is correct?

(a) John's ball will move faster because of spring of his striker is more elastic

(b) Peter's ball will move faster because of the spring of his striker is more elastic

(c) John's ball will move faster because the spring of his striker stores more potential energy

(d) Peter's ball will move faster because the spring of his striker stores more potential energy

3. In a football game, when the goalkeeper catches the ball, he causes it to _____

(a) Change its direction              (b) Increase its speed

(c) Reduce its speed                     (d) Stop moving

4. Does a falling body accelerate? Why?

(a) Yes, because the gravity is a force that causes it to move faster

(b) No, because the gravity is a force that causes it to move at constant speed

(c) Yes, because the air causes it to accelerate

(d) No, because air keeps it moving at constant speed

5. A boy set up an experiment as shown in the diagram. As he slid the magnet across the wooden board, the ball bearing followed the magnet's movement and direction. What does the experiment show?

(i) Magnetic force can be seen.

(ii) Friction and gravity help to move the ball bearing.

(iii) The ball bearing is made of a magnetic substance.

(iv) Magnetic force can pass through the wooden board.

(a) (i) & (ii)                                    (b) (iii) & (iv)

(c) (i), (iii) & (iv)                           (d) (ii), (iii) & (iv)

6. When a bowler slides the bowling ball on the lane to hit the pins, the force exerted on bowling ball is able to _______.

(a) Stop a moving object

(b) Change the direction of a moving object

(c) Change the speed of a moving object

(d) Change the position of a stationary object

7. It is easier to swim in sea water than in river water because

(a) Sea water is more dense than river water

(b) Sea water has waves

(c) Sea has large quantity of water

(d) None of these

8. Pressure exerted by a body on a surface is

(a) Force × area                           (b) Force ÷ area

(c) Area ÷ force                            (d) Force ÷ volume

9. Deep sea divers put on special suit to

(a) Maintain their body temperature in cold sea water

(b) Protect against sea animals

(c) Maintain pressure

(d) Keep them dry

10. Standing liquid exerts pressure on the bottom due to its

(a) Mass                                         (b) Weight

(c) Both mass and weight           (d) None of these

Answer Key:

(1)-(c); (2)-(d); (3)-(d); (4)-(d); (5)-(a); (6)-(b); (7)-(d); (8)-(a); (9)-(b); (10)-(c)