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1. A car accelerates uniformly from rest to 20 m/s
in 5 seconds. What is its acceleration?
A) 2 m/s²
B) 4 m/s²
C) 5 m/s²
D) 10 m/s²
B
Using v = u + at, 20 = 0 + a(5), so a = 4 m/s².
, 2. A particle moves with constant velocity. Which
statement is true?
A) Its acceleration is positive
B) Its acceleration is negative
C) Its acceleration is zero
D) Its displacement is zero
C
Constant velocity means no change in velocity, so
acceleration is zero.
3. A stone is dropped from rest. What distance
does it fall in 2 seconds? (g = 9.8 m/s²)
A) 9.8 m
B) 19.6 m
C) 4.9 m
D) 39.2 m
B
Using s = ut + ½at² = 0 + ½(9.8)(2²) = 19.6 m.
4. A force of 10 N acts on a mass of 2 kg. What is
the acceleration?
, A) 2 m/s²
B) 5 m/s²
C) 10 m/s²
D) 20 m/s²
B
F = ma → a = F/m = 10/2 = 5 m/s².
5. A ball is thrown vertically upwards with speed
14.7 m/s. How long until it returns to the
thrower’s hand?
A) 1.5 s
B) 3 s
C) 4.5 s
D) 6 s
B
Time to top = u/g = 14.7/9.8 = 1.5 s. Total time = 2
× 1.5 = 3 s.
6. A car travels 100 m in 5 s, then 200 m in 10 s at
constant speed. What is the average speed for
the whole journey?
, A) 15 m/s
B) 20 m/s
C) 25 m/s
D) 30 m/s
B
Total distance = 300 m, total time = 15 s, average
speed = 300/15 = 20 m/s.
7. The gradient of a displacement–time graph
represents:
A) Acceleration
B) Velocity
C) Distance
D) Force
B
Gradient = Δs/Δt = velocity.
8. A particle is in equilibrium. Which statement is
correct?
A) It must be at rest
B) It cannot be moving