Chapter Exam

Chapter 5: I'm Up and Down and Round and Round — Online MCQ Test

Q: Which of the following is an example of oscillatory motion?

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.

Q: A pendulum completes one full to-and-fro motion in 2 seconds. What is its time period?

Answer: B. 2 seconds — Time period is the time taken to complete one full cycle. Here, one complete oscillation takes 2 seconds.

Q: A pendulum goes from left extreme to right extreme and returns to the left extreme. This complete motion is called:

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.

Q: A pendulum has a time period of 2 seconds. How many complete oscillations will it make in 10 seconds?

Answer: B. 5 — Number of oscillations = total time ÷ time period = 10 ÷ 2 = 5. This is a standard application of the concept of time period.

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 for CBSE(NCERT) Grade 9 MATHS. 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.

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Chapter 5: I'm Up and Down and Round and Round — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 9 MATHS — Chapter 5: I'm Up and Down and Round and Round, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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 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.

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.

A pendulum has a time period of 2 seconds. How many complete oscillations will it make in 10 seconds?