Multiple Choice Test
Indicate the correct answer by clicking on the button next to the numbers 1, 2, 3 or 4. There is only one correct answer per question. After you have answered all multiple choice questions compare your choices with the correct answers.

Equations of Motion I

1.) A motorcycle accelerates from 10 m/s to 25 m/s in 5 seconds. What is the average acceleration of the bike?

1 | 3 m/s2
2 | 5 m/s2
3 | 15 m/s2
4 | 25 m/s2

2.) A ball is thrown vertically into the air and when it returns after an interval of 2 seconds, it is caught. Which one of the following statements is true if the acceleration due to gravity is 10 m/s2 and air resistance can be neglected:

1 | The acceleration at the top of its flight is 10 m/s2.
2 | The time taken for the descending motion does not equal the time taken for the ascending motion.
3 | The maximum height it reaches does not depend on the force of gravity.
4 | The acceleration after it leaves the hand is 10 m/s2 downwards.

3.) A ball is thrown vertically up from the top of a building and the graph to the right shows the variation of its velocity with time up to the 5th second.
At the end of its journey (as shown by the graph) the ball is …

1 | back at its point of projection.
2 | 25 m from the point of projection and moving downwards.
3 | 45 m from the point of projection and moving downwards.
4 | 25 m from the point of projection and moving upwards.

4.) Which of the given velocity : time graphs
(see box below)
matches the given acceleration : time graph which you see at the right?

1 | A
2 | B
3 | C
4 | D

5.) A ball is thrown vertically upwards. If air resistance is ignored, the ball will move with constant …

1 | velocity
2 | momentum
3 | acceleration
4 | potential energy

6.) A ball is thrown vertically upwards. Ignore air resistance. Take the upward motion as positive. Which one of the following graphs represents the velocity of the ball as a function of time?

1 | A
2 | B
3 | C
4 | D

7.) Two heavy metal spheres P and Q are simultaneously dropped from the same height as shown in the diagram to the right. The sphere P is much smaller than sphere Q. Ignore the effect of air resistance.
Which one of the following is the correct observation and possible reason for what happens?

| observation | possible reason
1 | they reach the floor simultaneously | gravitational forces are equal for both spheres
2 | they reach the floor simultaneously | the gravitational acceleration is the same for both
3 | P reaches the floor first | smaller objects always fall 'faster' than bigger ones
4 | Q reaches the floor first | the earth's force of gravity is greater on the heavier object

8.) A ball falls vertically from rest from a high cliff from point A as shown in the sketch. At point B the ball reaches its terminal velocity. While the ball is falling from B to C, its kinetic energy will ...

1 | be zero
2 | increase
3 | decrease
4 | remain constant

9.) A rock is thrown vertically upwards with a speed 'v' from the edge of a cliff. At the same moment, a second rock is thrown vertically downwards with the same initial speed 'v'. Which of the following statements regarding the motion of the rocks is true (ignore air resistance.)?

1 | The rock which was thrown upwards reaches the bottom of the cliff with a higher velocity.
2 | The rock which was thrown downwards reaches the bottom of the cliff with a higher velocity.
3 | Both rocks reach the bottom of the cliff with the same velocity at the same time.
4 | Both rocks reach the bottom of the cliff with the same velocity but at different times.

10.) The path PQR of a soccer ball kicked from a point P on the ground is shown in the diagram at the right. At point Q, the ball is at its maximum height.

Which ONE of the following vectors may represent the acceleration due to gravity of the ball at point Q?

1 | A
2 | B
3 | C
4 | D

Results

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