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Kinematics
10 Class 9 Physics questions with answers and explanations.
Printable worksheet with answer key
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Which of these is a vector quantity?
- 1 Time
- 2 Velocity
- 3 Speed
- 4 Distance
Show answer
Correct answer: Velocity
Velocity has both magnitude and direction. Speed, distance and time have only magnitude.
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A car covers 120 km in 2 hours. What is its average speed?
- 1 120 km/h
- 2 60 km/h
- 3 240 km/h
- 4 40 km/h
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Correct answer: 60 km/h
Average speed = distance / time = 120 / 2 = 60 km/h.
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A body starts from rest and reaches 20 m/s in 5 s. What is its acceleration?
- 1 2 m/s²
- 2 5 m/s²
- 3 100 m/s²
- 4 4 m/s²
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The slope of a distance-time graph gives:
- 1 Acceleration
- 2 Force
- 3 Speed
- 4 Displacement
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Correct answer: Speed
On a distance-time graph, slope = change in distance / change in time, which is speed.
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An object falls freely from rest for 3 s. What is its speed at the end? (g = 10 m/s²)
- 1 90 m/s
- 2 30 m/s
- 3 10 m/s
- 4 20 m/s
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The area under a speed-time graph gives:
- 1 Distance travelled
- 2 Force
- 3 Time
- 4 Acceleration
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Correct answer: Distance travelled
Area under a speed-time graph equals the distance travelled.
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A car moves with a constant speed of 20 m/s. How far does it travel in 5 s?
- 1 200 m
- 2 100 m
- 3 4 m
- 4 25 m
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Which equation of motion links v, u, a and t?
- 1 v = u a t
- 2 s = v t
- 3 a = v + u
- 4 v = u + a t
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Correct answer: v = u + a t
The first equation of motion is v = u + a t.
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A body moving with uniform velocity has an acceleration of:
- 1 9.8 m/s²
- 2 Zero
- 3 Infinite
- 4 1 m/s²
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A stone is thrown upwards. At its highest point its velocity is:
- 1 Negative infinity
- 2 Zero
- 3 Equal to g
- 4 Maximum