Basic Concepts of Force and Motion
1. In science, a push or pull on an object is called:
a) Pick
b) Lift
c) Force
d) Shut
Answer: c
2. Newton’s First Law of Motion is also known as the Law of:
a) Momentum
b) Inertia
c) Force
d) Energy
Answer: b
3. What is the SI unit of acceleration?
a) m/s²
b) m/s
c) s/m
d) s/m²
Answer: a
4. A body at rest is considered to have what speed?
a) Increasing
b) Decreasing
c) Inverse
d) Zero
Answer: d
5. The motion of a freely falling object is an example of:
a) Uniformly accelerated motion
b) Non-uniformly accelerated motion
c) Constant velocity motion
d) Constant speed motion
Answer: a
6. What is the other name for Galileo’s law of falling bodies?
a) Law of motion
b) Newton’s First Law
c) Newton’s Second Law
d) Newton’s Third Law
Answer: b
Inertia, Momentum, and Newton’s Laws
7. Newton’s First Law of Motion deals with the concept of:
a) Energy
b) Work
c) Momentum
d) Inertia
Answer: d
8. Which law explains the working principle of a rocket?
a) Conservation of angular momentum
b) Conservation of mass
c) Conservation of energy
d) Conservation of linear momentum
Answer: d
9. A falling object naturally retains its velocity due to:
a) Force
b) Acceleration
c) Friction
d) Inertia
Answer: d
10. The law of inertia is also known as:
a) Newton’s First Law of Motion
b) Newton’s Second Law of Motion
c) Newton’s Third Law of Motion
d) None of these
Answer: a
Types and Effects of Forces
11. The force acting perpendicular to the surface is called:
a) Pressure
b) Work
c) Thrust
d) Friction
Answer: c
12. Which of the following forces is dissipative (results in energy loss)?
a) Gravitational
b) Frictional
c) Magnetic
d) Electrostatic
Answer: b
13. Contact force is another name for:
a) Friction
b) Magnetic force
c) Electrostatic force
d) Muscular force
Answer: d
14. The frictional force exerted by fluids is also known as:
a) Drag
b) Buoyancy
c) Upthrust
d) Convection
Answer: a
15. Which of the following explains the working of hydraulic brakes in vehicles?
a) Bernoulli’s Law
b) Poiseuille’s Principle
c) Pascal’s Law
d) Archimedes’ Principle
Answer: c
Applications and Phenomena
16. A steel sphere dropped in a container of mercury will:
a) Sink
b) Float
c) Partially immerse
d) Dissolve
Answer: c
17. A boat will not sink as long as it displaces water equal to its own:
a) Volume
b) Weight
c) Surface area
d) Density
Answer: b
18. A tennis ball and a heavier cricket ball are thrown with the same velocity. To stop the cricket ball, we require:
a) More force
b) Less force
c) Equal force
d) Infinite force
Answer: a
19. A raindrop becomes spherical while falling due to:
a) Viscosity
b) Surface tension
c) Atmospheric pressure
d) Gravitational force
Answer: b