# Physics - Mechanics Final Test

6 Questions | Total Attempts: 2376  Settings  Related Topics
• 1.
Using a stop-watch, Tom measured the time for a motor car to pass through 2 streetlights. The reading was 1.2 s. If the reaction time of Tom is 0.2 s, what is the maximum possible percentage error of his measurement?
• A.

8.33%

• B.

16.7%

• C.

33.3%

• D.

66.7%

• 2.
A boy throws a ball vertically upwards as shown.  What is the displacement of the ball when it returns to its starting point?
• A.

0 m

• B.

5 m

• C.

5 m upwards then 5 m downwards

• D.

10 m

• 3.
In the following figure, a ball runs on a smooth rail from P to Q. Which of the following graphs best represents the variation of the distance d travelled by the ball with time t?
• A.

Graph A

• B.

Graph B

• C.

Graph C

• D.

Graph D

• 4.
Balls A and B are thrown vertically upwards and downwards respectively. If their initial speeds are the same, which of the following statements is/are correct when they meet?           (1)  Their displacements should be the same.           (2)  Their speeds should be the same.           (3)  Their accelerations should be the same.
• A.

(1) only

• B.

(3) only

• C.

(1) and (3) only

• D.

(1) and (3) only

• 5.
The following graph shows that quantity X is directly proportional to time t.           Which of the following can be the quantity X?           (1)  Velocity of a freely falling object with negligible air resistance.           (2)  Displacement of an object moving at constant velocity.           (3)  Distance travelled by an object moving with constant acceleration.
• A.

(1) and (2) only

• B.

(1) and (3) only

• C.

(2) and (3) only

• D.

(1), (2) and (3)

• 6.
In the figure below, a cannon-ball has been fired from a cannonWhich of the following figures best shows the direction of the resultant force acting on the cannon-ball at different time?
• A.

Picture A

• B.

Picture B

• C.

Picture C

• D.

Picture D