1.
The SI unit of mass is:
A
Newton
B
Gram
C
Kilogram
D
Pound
2.
SI unit of momentum is:
A
kg m s⁻¹
B
kg m s⁻²
C
N s⁻¹
D
J s
3.
The centre of gravity of an irregularly shaped thin lamina can be found using a:
A
Plumb line
B
Screw gauge
C
Vernier callipers
D
Metre rule
4.
Free body diagram represents:
A
Motion of body
B
All forces acting on a body
C
Shape of body
D
Velocity of body
5.
A couple is formed by:
A
two forces perpendicular to each other.
B
two equal and opposite forces not in the same line.
C
two equal and opposite forces in the same line.
D
two unequal forces.
6.
The turning effect of a force is called:
A
Momentum
B
Pressure
C
Work
D
Torque
7.
Mass of a body is defined as:
A
Force acting on the body
B
Quantity of matter in the body
C
Weight of the body
D
Volume of the body
8.
Which of the following is an example of action-reaction pair?
A
Weight and mass
B
Push on wall and wall pushing back
C
Friction and gravity
D
Speed and velocity
9.
Value of gravitational field strength on Earth is approximately:
A
1 N/kg
B
4.9 N/kg
C
9.8 N/kg
D
98 N/kg
10.
Weight of a body depends upon:
A
Mass only
B
Gravity only
C
Mass and gravity
D
Volume
11.
Which of the following increases impulse?
A
Decreasing time
B
Increasing time
C
Decreasing force
D
Decreasing momentum
12.
The mathematical form of Newton’s Second Law is:
A
F = mv
B
F = ma
C
F = m/a
D
F = a/m
13.
Newton’s Third Law of Motion states that:
A
Force equals mass times acceleration
B
Every action has an equal and opposite reaction
C
Body remains at rest or in motion
D
Momentum is conserved
14.
In free body diagram, forces are shown by:
A
Lines
B
Dots
C
Arrows
D
Circles
15.
Spring balance measures:
A
Mass
B
Volume
C
Force
D
Density
16.
Force is a vector quantity because it has:
A
Magnitude only
B
Direction only
C
Magnitude and direction
D
No unit
17.
Net force zero means body has:
A
Increasing speed
B
Decreasing speed
C
Constant velocity
D
Changing direction
18.
Mass measured by electronic balance depends on:
A
Gravity
B
Spring constant
C
Comparison with standard mass
D
Temperature
19.
According to Newton’s First Law, a body remains at rest if:
A
Net force is zero
B
Force is applied
C
Mass is large
D
Velocity is high
20.
When brakes are applied, passengers move forward due to:
A
Gravity
B
Friction
C
Inertia
D
Weight
21.
Greater mass means:
A
Less inertia
B
More inertia
C
No inertia
D
Zero inertia
22.
A force can change the direction of velocity as in:
A
Straight line motion
B
Circular motion
C
Rest position
D
Equilibrium
23.
The tendency of a body to oppose change in motion is called:
A
Momentum
B
Force
C
Inertia
D
Velocity
24.
Impulse is equal to:
A
Force × distance
B
Force × time
C
Mass × acceleration
D
Momentum ÷ time
25.
Which is a non-contact force?
A
Friction
B
Tension
C
Gravitational force
D
Normal reaction
26.
Impulse is equal to change in:
A
Force
B
Velocity
C
Momentum
D
Mass
27.
Which object has greater inertia?
A
Cricket ball
B
Football
C
Truck
D
Tennis ball
28.
Inertia depends upon:
A
Volume
B
Mass
C
Velocity
D
Weight
29.
If net force on a body is not zero, body will:
A
Remain at rest
B
Move with constant velocity
C
Accelerate
D
Stop moving
30.
Principle of conservation of momentum states that:
A
Momentum always increases
B
Momentum is lost in collisions
C
Total momentum remains constant
D
Momentum depends on force
31.
If all forces acting on a body cancel each other, the resultant force is:
A
Maximum
B
Minimum
C
Zero
D
Infinite
32.
Seat belts are used in cars to overcome effects of:
A
Weight
B
Mass
C
Inertia
D
Momentum
33.
How many fundamental forces are there in nature?
A
Two
B
Three
C
Four
D
Five
34.
Unit of force in SI system is:
A
Dyne
B
Joule
C
Newton
D
Watt
35.
Action and reaction forces act on:
A
Same body
B
Different bodies
C
Same direction
D
Same surface
36.
Which instrument is used to measure mass?
A
Spring balance
B
Force meter
C
Electronic balance
D
Thermometer
37.
Why does a gun recoil when a bullet is fired?
A
Due to gravity
B
Due to friction
C
Due to Newton’s Third Law
D
Due to inertia