Chapter 5: I'm Up and Down and Round and Round — Online MCQ Test
MATHS · Grade 9 · CBSE(NCERT)
Practice Chapter 5: I'm Up and Down and Round and Round with a free chapter-wise online MCQ test.
This chapter covers: Periodic Motion Circular Motion Oscillation Pattern Wave Graph Cycle Repetition Rotation Amplitude Data Visualization Introducing repeating patterns circular motion graph interpret....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: I'm Up and Down and Round and Round — Important Questions & Answers
What is periodic motion?
- A. Motion that repeats itself after equal intervals of time
- B. Motion that always moves in a straight line
- C. Motion that never repeats
- D. Motion that stops after one cycle
Answer: A. Motion that repeats itself after equal intervals of time
Periodic motion is a motion that repeats after regular time intervals. Examples include a swinging pendulum and the rotation of a wheel.
Periodic motion is a motion that repeats after regular time intervals. Examples include a swinging pendulum and the rotation of a wheel.
Which of the following is an example of oscillatory motion?
- A. A car moving on a straight road
- B. The hands of a clock
- C. A child on a swing
- D. A stone thrown upward
Answer: C. A child on a swing
A child on a swing moves to and fro about a mean position, which is oscillatory motion. The motion repeats in a regular pattern.
A child on a swing moves to and fro about a mean position, which is oscillatory motion. The motion repeats in a regular pattern.
A pendulum completes one full to-and-fro motion in 2 seconds. What is its time period?
- A. 1 second
- B. 2 seconds
- C. 4 seconds
- D. 0.5 second
Answer: B. 2 seconds
Time period is the time taken to complete one full cycle. Here, one complete oscillation takes 2 seconds.
Time period is the time taken to complete one full cycle. Here, one complete oscillation takes 2 seconds.
A pendulum goes from left extreme to right extreme and returns to the left extreme. This complete motion is called:
- A. Half cycle
- B. One cycle
- C. Amplitude
- D. Frequency
Answer: B. One cycle
One full movement starting from one extreme, going to the other extreme, and returning to the starting extreme is one cycle. It is also called one oscillation.
One full movement starting from one extreme, going to the other extreme, and returning to the starting extreme is one cycle. It is also called one oscillation.
A pendulum has a time period of 2 seconds. How many complete oscillations will it make in 10 seconds?
- A. 2
- B. 5
- C. 10
- D. 20
Answer: B. 5
Number of oscillations = total time ÷ time period = 10 ÷ 2 = 5. This is a standard application of the concept of time period.
Number of oscillations = total time ÷ time period = 10 ÷ 2 = 5. This is a standard application of the concept of time period.