Online Test — Motion — Speed, Velocity and Acceleration
25 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 25
A quantity that has only magnitude and no direction is a:
Vector
Scalar
Force
Displacement
Explanation: A scalar has only magnitude; a vector has magnitude and direction.
Question 2 of 25
Which of the following is a vector quantity?
Distance
Mass
Velocity
Time
Explanation: Velocity has both magnitude and direction, so it is a vector.
Question 3 of 25
The total length of the path actually travelled is the:
Displacement
Distance
Speed
Acceleration
Explanation: Distance is the total length of the path actually travelled.
Question 4 of 25
If a person returns to the starting point, the displacement is:
Maximum
Zero
Equal to distance
Negative
Explanation: Displacement is the straight-line gap from start to end; if they coincide, it is zero.
Question 5 of 25
Displacement is the shortest straight-line distance from the start to the:
Midpoint
Final position
Highest point
Path
Explanation: Displacement is measured from the start to the final position, in a direction.
Question 6 of 25
Speed is calculated as:
distance × time
distance ÷ time
time ÷ distance
force ÷ area
Explanation: Speed = distance ÷ time (v = d/t).
Question 7 of 25
The SI unit of speed is the:
km/h
metre per second (m/s)
newton
pascal
Explanation: The SI unit of speed is the metre per second (m/s).
Question 8 of 25
A car covers 100 km in 2 hours. Its average speed is:
50 km/h
200 km/h
102 km/h
25 km/h
Explanation: Average speed = total distance ÷ total time = 100 ÷ 2 = 50 km/h.
Question 9 of 25
Speed in a particular direction is called:
Distance
Velocity
Acceleration
Force
Explanation: Velocity is the speed of an object in a particular direction.
Question 10 of 25
Covering equal distances in equal intervals of time is called:
Non-uniform speed
Uniform speed
Acceleration
Retardation
Explanation: Uniform speed means equal distances are covered in equal time intervals.
Question 11 of 25
Acceleration is the rate of change of:
Distance
Velocity
Mass
Time
Explanation: Acceleration is the rate of change of velocity.
Question 12 of 25
The SI unit of acceleration is:
m/s
m/s²
km/h
newton
Explanation: The SI unit of acceleration is the metre per second squared (m/s²).
Question 13 of 25
A car's velocity rises from 10 m/s to 30 m/s in 5 s. Its acceleration is:
2 m/s²
4 m/s²
5 m/s²
8 m/s²
Explanation: a = (v − u)/t = (30 − 10)/5 = 20/5 = 4 m/s².
Question 14 of 25
Negative acceleration, when an object slows down, is called:
Velocity
Retardation
Speed
Displacement
Explanation: Negative acceleration (slowing down) is called retardation or deceleration.
Question 15 of 25
The acceleration of an object moving with constant velocity is:
Maximum
Zero
Negative
Increasing
Explanation: With no change in velocity, the acceleration is zero.
Question 16 of 25
On a distance–time graph, the slope of the line represents the:
Acceleration
Speed
Force
Mass
Explanation: The slope of a distance–time graph gives the speed.
Question 17 of 25
A horizontal line on a distance–time graph means the object is:
Speeding up
At rest
Accelerating
Slowing down
Explanation: A flat line means distance is not changing, so the object is at rest.
Question 18 of 25
A straight sloping line on a distance–time graph indicates:
Non-uniform speed
Uniform speed
Zero speed
Retardation
Explanation: A straight sloping line means equal distances in equal times — uniform speed.
Question 19 of 25
On a speed–time graph, the slope of the line represents the:
Distance
Acceleration
Mass
Time
Explanation: The slope of a speed–time graph gives the acceleration.
Question 20 of 25
The area under a speed–time graph gives the:
Speed
Acceleration
Distance travelled
Force
Explanation: The area under a speed–time graph equals the distance travelled.
Question 21 of 25
The tendency of an object to resist a change in its state of motion is called:
Force
Inertia
Speed
Pressure
Explanation: Inertia is the tendency to resist a change in the state of motion (Newton's first law).
Question 22 of 25
Newton's second law is expressed by the formula:
F = ma
P = F/A
v = d/t
W = mg
Explanation: Newton's second law states Force = mass × acceleration (F = ma).
Question 23 of 25
A 5 kg object acted on by a 20 N force has an acceleration of:
2 m/s²
4 m/s²
5 m/s²
100 m/s²
Explanation: a = F/m = 20 ÷ 5 = 4 m/s².
Question 24 of 25
"For every action there is an equal and opposite reaction" is Newton's:
First law
Second law
Third law
Law of gravitation
Explanation: This is Newton's third law of motion.
Question 25 of 25
A rocket rises because it pushes gases downward and the gases push it:
Downward
Sideways
Upward
Backward only
Explanation: By the third law, pushing gases down produces an equal upward reaction on the rocket.