Vidaara.orgClass 7 · Mathematics
CodeVID-M7-WS
Motion and Force — 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 both magnitude and direction is called a:
- A.Scalar
- B.Vector
- C.Unit
- D.Constant
2.
The shortest straight-line distance from start to finish, in a given direction, is the:
- A.Distance
- B.Displacement
- C.Speed
- D.Path
3.
The SI unit of speed is the:
- A.Kilometre
- B.Metre per second
- C.Second
- D.Newton
4.
A car travels 100 m in 5 s. Its speed is:
- A.20 m/s
- B.5 m/s
- C.500 m/s
- D.0.05 m/s
5.
A car moving around a circular track at steady speed has a velocity that is:
- A.Constant
- B.Continuously changing
- C.Always zero
- D.Equal to its speed
6.
Motion in which equal distances are covered in equal intervals of time is called:
- A.Non-uniform motion
- B.Uniform motion
- C.Circular motion
- D.Random motion
7.
The rate of change of velocity of an object with time is called:
- A.Speed
- B.Distance
- C.Acceleration
- D.Displacement
8.
A horizontal straight line on a distance-time graph shows that the object is:
- A.Speeding up
- B.At rest
- C.Slowing down
- D.Accelerating
9.
For uniform motion, the distance-time graph is a:
- A.Curved line
- B.Straight slanting line
- C.Horizontal line
- D.Zig-zag line
10.
When an object slows down with time, the change in its motion is called:
- A.Acceleration
- B.Uniform motion
- C.Deceleration
- D.Speed
11.
The SI unit of force is the:
- A.Joule
- B.Newton
- C.Metre
- D.Watt
12.
The tendency of an object to resist a change in its state of rest or motion is called:
- A.Force
- B.Inertia
- C.Acceleration
- D.Friction
13.
Newton's second law of motion is expressed by the equation:
- A.F = m/a
- B.F = ma
- C.F = a/m
- D.F = m + a
14.
For every action there is an equal and opposite reaction. This is Newton's:
- A.First law
- B.Second law
- C.Third law
- D.Law of inertia
15.
A force of 12 N acts on a 3 kg object. Its acceleration is:
- A.4 m/s²
- B.36 m/s²
- C.9 m/s²
- D.0.25 m/s²
16.
Friction always acts in a direction that is:
- A.Same as the motion
- B.Opposite to the motion
- C.At right angles to motion
- D.Upward
17.
Friction is mainly caused by the:
- A.Colour of surfaces
- B.Roughness of surfaces
- C.Weight of air
- D.Temperature only
18.
Which type of friction is the smallest for the same pair of surfaces?
- A.Static friction
- B.Sliding friction
- C.Rolling friction
- D.Fluid friction
19.
Ball-bearings are used in machines because they convert sliding friction into:
- A.Static friction
- B.Greater friction
- C.Rolling friction
- D.No friction
20.
Applying oil to machine parts is an example of:
- A.Increasing friction
- B.Reducing friction
- C.Adding inertia
- D.Increasing mass
21.
Pressure is defined as the force acting per unit:
- A.Time
- B.Area
- C.Mass
- D.Volume
22.
The SI unit of pressure is the:
- A.Newton
- B.Pascal
- C.Joule
- D.Watt
23.
For the same force, the pressure is greater when the area of contact is:
- A.Larger
- B.Smaller
- C.Zero
- D.Unchanged
24.
The upward force exerted by a liquid on an object immersed in it is called:
- A.Friction
- B.Upthrust (buoyant force)
- C.Pressure
- D.Weight
25.
According to Archimedes' Principle, the upthrust on an immersed object equals the:
- A.Weight of the object
- B.Weight of liquid displaced
- C.Volume of the object
- D.Density of the liquid
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Vector
- (B) Displacement
- (B) Metre per second
- (A) 20 m/s
- (B) Continuously changing
- (B) Uniform motion
- (C) Acceleration
- (B) At rest
- (B) Straight slanting line
- (C) Deceleration
- (B) Newton
- (B) Inertia
- (B) F = ma
- (C) Third law
- (A) 4 m/s²
- (B) Opposite to the motion
- (B) Roughness of surfaces
- (C) Rolling friction
- (C) Rolling friction
- (B) Reducing friction
- (B) Area
- (B) Pascal
- (B) Smaller
- (B) Upthrust (buoyant force)
- (B) Weight of liquid displaced
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