7 Questions
| Total Attempts: 88

Objective quiz for iitjee

Questions and Answers

- 1.As an object falls freely in vacuum, its
- A.
1velocity increases

- B.
2acceleration increases

- C.
3both velocity and acceleration increases

- D.
4only distance increases

- 2.A ball is thrown upwards and caught when it comes back down. In the presence of air resistance, the speed of the ball when caught would be
- A.
Less than the speed it had when thrown upwards.

- B.
More than the speed it had when thrown upwards.

- C.
The same as the speed it had when thrown upwards.

- 3.Suppose an object is in free fall. Each second the object falls
- A.
The same distance as in the second before.

- B.
A larger distance as in the second before.

- C.
With the same average speed

- D.
With the same instantaneous speed.

- 4.A point mass of 1 kg collides elastically with a stationary point mass of 5 kg. After their collision, the 1 kg mass reverses its direction and moves with a speed of 2 ms−1. Which of the following statement(s) is (are) correct for the system of these two masses?
- A.
Total momentum of the system is 3 kg ms−1

- B.
Momentum of 5 kg mass after collision is 4 kg ms−1

- C.
Kinetic energy of the centre of mass is 0.80 J

- D.
Total kinetic energy of the system is 4J

- 5.A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He uses a stop watch with the least count of 1 sec for this and records 40 seconds for 20 oscillations. For this observation, which of the following statement(s) is (are) true?
- A.
Error in measuring T, the time period, is 0.04 seconds

- B.
Error in measuring T, the time period, is 1 second

- C.
Percentage error in the determination of g is 5%

- D.
Percentage error in the determination of g is 2.5%

- 6.At the highest point of flight of a ball thrown upwards,
- A.
The acceleration is zero.

- B.
The acceleration is the minimal.

- C.
the acceleration is directed downwards

- D.
the acceleration is directed upward

- 7.A free falling object is dropped from a height from rest. After falling for 1 second, the speed is about
- A.
5m/s

- B.
4.9m/s

- C.
10m/s

- D.
9.8m/s

Chapter 2: Describing Motion: Kinematics In One Dimension
Chapter 2: Describing Motion: Kinematics In One Dimension

Kinematics Trivia Quiz: Speed,Velocity, And Acceleration!
Kinematics Trivia Quiz: Speed,Velocity, And Acceleration!