Vidaara.orgClass 8 · Mathematics
CodeVID-M8-WS
Motion — Speed, Velocity and Acceleration — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
25 × 1 = 25 marks
1.
A quantity that has only magnitude and no direction is a:
- A.Vector
- B.Scalar
- C.Force
- D.Displacement
2.
Which of the following is a vector quantity?
- A.Distance
- B.Mass
- C.Velocity
- D.Time
3.
The total length of the path actually travelled is the:
- A.Displacement
- B.Distance
- C.Speed
- D.Acceleration
4.
If a person returns to the starting point, the displacement is:
- A.Maximum
- B.Zero
- C.Equal to distance
- D.Negative
5.
Displacement is the shortest straight-line distance from the start to the:
- A.Midpoint
- B.Final position
- C.Highest point
- D.Path
6.
Speed is calculated as:
- A.distance × time
- B.distance ÷ time
- C.time ÷ distance
- D.force ÷ area
7.
The SI unit of speed is the:
- A.km/h
- B.metre per second (m/s)
- C.newton
- D.pascal
8.
A car covers 100 km in 2 hours. Its average speed is:
- A.50 km/h
- B.200 km/h
- C.102 km/h
- D.25 km/h
9.
Speed in a particular direction is called:
- A.Distance
- B.Velocity
- C.Acceleration
- D.Force
10.
Covering equal distances in equal intervals of time is called:
- A.Non-uniform speed
- B.Uniform speed
- C.Acceleration
- D.Retardation
11.
Acceleration is the rate of change of:
- A.Distance
- B.Velocity
- C.Mass
- D.Time
12.
The SI unit of acceleration is:
- A.m/s
- B.m/s²
- C.km/h
- D.newton
13.
A car's velocity rises from 10 m/s to 30 m/s in 5 s. Its acceleration is:
- A.2 m/s²
- B.4 m/s²
- C.5 m/s²
- D.8 m/s²
14.
Negative acceleration, when an object slows down, is called:
- A.Velocity
- B.Retardation
- C.Speed
- D.Displacement
15.
The acceleration of an object moving with constant velocity is:
- A.Maximum
- B.Zero
- C.Negative
- D.Increasing
16.
On a distance–time graph, the slope of the line represents the:
- A.Acceleration
- B.Speed
- C.Force
- D.Mass
17.
A horizontal line on a distance–time graph means the object is:
- A.Speeding up
- B.At rest
- C.Accelerating
- D.Slowing down
18.
A straight sloping line on a distance–time graph indicates:
- A.Non-uniform speed
- B.Uniform speed
- C.Zero speed
- D.Retardation
19.
On a speed–time graph, the slope of the line represents the:
- A.Distance
- B.Acceleration
- C.Mass
- D.Time
20.
The area under a speed–time graph gives the:
- A.Speed
- B.Acceleration
- C.Distance travelled
- D.Force
21.
The tendency of an object to resist a change in its state of motion is called:
- A.Force
- B.Inertia
- C.Speed
- D.Pressure
22.
Newton's second law is expressed by the formula:
- A.F = ma
- B.P = F/A
- C.v = d/t
- D.W = mg
23.
A 5 kg object acted on by a 20 N force has an acceleration of:
- A.2 m/s²
- B.4 m/s²
- C.5 m/s²
- D.100 m/s²
24.
"For every action there is an equal and opposite reaction" is Newton's:
- A.First law
- B.Second law
- C.Third law
- D.Law of gravitation
25.
A rocket rises because it pushes gases downward and the gases push it:
- A.Downward
- B.Sideways
- C.Upward
- D.Backward only
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Scalar
- (C) Velocity
- (B) Distance
- (B) Zero
- (B) Final position
- (B) distance ÷ time
- (B) metre per second (m/s)
- (A) 50 km/h
- (B) Velocity
- (B) Uniform speed
- (B) Velocity
- (B) m/s²
- (B) 4 m/s²
- (B) Retardation
- (B) Zero
- (B) Speed
- (B) At rest
- (B) Uniform speed
- (B) Acceleration
- (C) Distance travelled
- (B) Inertia
- (A) F = ma
- (B) 4 m/s²
- (C) Third law
- (C) Upward
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