Chapter 7 PHYSICAL SCIENCE : Motion — Online MCQ Test
SCIENCE · CLASS 9th · Andhra State Board
Practice Chapter 7 PHYSICAL SCIENCE : Motion with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers distance displacement velocity acceleration uniform non-uniform motion equations of motion and uniform circular motion..
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Chapter 7 PHYSICAL SCIENCE : Motion — Important Questions & Answers
The SI unit of acceleration is:
- A. m/s
- B. m/s^2
- C. m^2/s
- D. km/h
Answer: B. m/s^2
Acceleration is defined as the rate of change of velocity, and its SI unit is meters per second squared.
Acceleration is defined as the rate of change of velocity, and its SI unit is meters per second squared.
Which of the following is a vector quantity?
- A. Distance
- B. Speed
- C. Displacement
- D. Time
Answer: C. Displacement
Displacement is a vector quantity because it has both magnitude and direction.
Displacement is a vector quantity because it has both magnitude and direction.
An object covers equal distances in equal intervals of time. This motion is called:
- A. Non-uniform motion
- B. Uniform motion
- C. Accelerated motion
- D. Circular motion
Answer: B. Uniform motion
By definition, uniform motion occurs when an object covers equal distances in equal time intervals.
By definition, uniform motion occurs when an object covers equal distances in equal time intervals.
An athlete completes one round of a circular track of diameter 200m in 40s. What will be the displacement at the end of 2 minutes 20 seconds?
- A. 0 m
- B. 200 m
- C. 220 m
- D. 100 m
Answer: B. 200 m
The athlete completes 3.5 rounds. After 3.5 rounds, the athlete is at the opposite end of the circular track, i.e., at a distance equal to the diameter.
The athlete completes 3.5 rounds. After 3.5 rounds, the athlete is at the opposite end of the circular track, i.e., at a distance equal to the diameter.
A body is projected vertically upwards with a velocity 'u'. What is its velocity at the maximum height?
- A. u
- B. u/2
- C. Zero
- D. g
Answer: C. Zero
At the peak of its trajectory, the object momentarily comes to a stop before falling back down, so velocity is zero.
At the peak of its trajectory, the object momentarily comes to a stop before falling back down, so velocity is zero.