Class 9 Physics · Chapter 2 · Test 3
Acceleration and Equations
25 MCQs • Practice acceleration formulas, SI units, deceleration, and numerical problems based on the supplied Class 9 Physics Mechanics chapter.
25 questions · 20 min · 25 marks
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Sample questions
The first 5 of 25. Try each one, then tap to see the answer.
Question 1
What is acceleration?
- ADistance travelled per unit time
- BRate of change of velocity with time
- CDisplacement per unit time
- DChange in distance per unit mass
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Answer: B
Acceleration is defined as the time rate of change of velocity.
Question 2
What is the SI unit of acceleration?
- Am/s
- Bm/s^2
- Ckm/h
- Dkg m/s
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Answer: B
The SI unit of acceleration is metre per second squared.
Question 3
Which formula gives average acceleration?
- Aa = distance/time
- Ba = displacement/time
- Ca = change in velocity/time
- Da = time/change in velocity
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Answer: C
Average acceleration equals the change in velocity divided by the time taken.
Question 4
An object increases its velocity from 5 m/s to 25 m/s in 4 s. What is its average acceleration?
- A4 m/s^2
- B5 m/s^2
- C6 m/s^2
- D8 m/s^2
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Answer: B
Acceleration equals (25 - 5)/4 which is 5 m/s^2.
Question 5
A car starts from rest and reaches 20 m/s in 5 s. What is its average acceleration?
- A2 m/s^2
- B4 m/s^2
- C5 m/s^2
- D10 m/s^2
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Answer: B
Acceleration equals (20 - 0)/5 which is 4 m/s^2.
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