Forces in Physics: Master the Fundamentals of Motion

Question 1

Which of the following is NOT a fundamental force in physics?

Accepted Answer

Frictional force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 2

A heavy box is at rest on a flat, horizontal surface. Which forces are acting on the box?

Accepted Answer

Force of gravity and normal force

Answer

Force of gravity only

Answer

Normal force only

Answer

Force of gravity, normal force, and friction

Question 3

Which everyday scenario best exemplifies Newton's Third Law of Motion, where every action has an equal and opposite reaction?

Accepted Answer

A swimmer pushing off a pool wall

Answer

A ball rolling down an incline

Answer

A book placed on a table

Answer

A car moving on a road

Question 4

Magnets produce a region of influence around them. What is this region called?

Accepted Answer

Magnetic field

Answer

Gravitational field

Answer

Electric field

Question 5

When two objects interact, the forces they exert on each other are:

Accepted Answer

Equal in magnitude and opposite in direction

Answer

Equal in magnitude

Answer

Opposite in direction

Question 6

As a ball is thrown vertically upwards, it reaches a maximum height. At this point, which force(s) is/are primarily acting on it?

Accepted Answer

Gravity only

Answer

Friction only

Answer

Gravity and air resistance

Answer

None

Question 7

A block slides down an inclined plane. The force responsible for its acceleration is:

Accepted Answer

Gravity

Answer

Friction

Answer

Normal force

Answer

Tension

Question 8

In the International System of Units (SI), the unit of force is:

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 9

Which force pulls objects towards the center of the Earth?

Accepted Answer

Gravity

Answer

Friction

Answer

Magnetism

Answer

Tension

Question 10

Which of the following factors does NOT affect the force of friction?

Accepted Answer

Temperature

Answer

Surface roughness

Answer

Normal force

Answer

Coefficient of friction

Question 11

Which of the following is an example of a balanced force?

Accepted Answer

Two forces of equal magnitude but opposite direction acting on an object

Answer

A force pushing an object that is not moving

Answer

A force that causes an object to accelerate

Answer

A force that causes an object to change direction

Question 12

Which factor does NOT affect the magnetic force between two magnets?

Accepted Answer

Shape of the magnets

Answer

Distance between the magnets

Answer

Strength of the magnets

Answer

Orientation of the magnets

Question 13

In a car's braking system, the primary force responsible for stopping the car is:

Accepted Answer

Friction between brake pads and rotors

Answer

Magnetic force between brake pads and rotors

Answer

Gravitational force between brake pads and rotors

Answer

Electrostatic force between brake pads and rotors

Question 14

Which of the following is the force that attracts objects towards each other?

Accepted Answer

Gravity

Answer

Friction

Answer

Electromagnetism

Answer

Tension

Question 15

Which of the following is the formula for calculating gravitational force?

Accepted Answer

F = Gm₁m₂/r²

Answer

F = Fd

Answer

F = ma

Answer

F = qE

Question 16

Which of the following is the force that acts between two magnetic poles?

Accepted Answer

Magnetic force

Answer

Electric force

Answer

Gravitational force

Answer

Frictional force

Question 17

Which of the following is the property of a force that describes its tendency to cause rotation?

Accepted Answer

Moment

Answer

Magnitude

Answer

Direction

Answer

Line of action

Question 18

Which of the following is the relationship between force, mass, and acceleration?

Accepted Answer

F = ma

Answer

F = mg

Answer

a = F/m

Answer

m = F/a

Question 19

To separate a mixture of iron filings and sand, which method would involve using a magnet?

Accepted Answer

Place the mixture in a magnetic field to attract the iron filings, separating them from the sand.

Answer

Heat the mixture to melt the iron filings, causing them to separate from the sand.

Answer

Add water to the mixture to sink the iron filings, leaving the sand floating on the surface.

Answer

Use a sieve to separate the iron filings from the sand based on their different sizes.

Question 20

In SI units, what is the unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Pascal

Answer

Watt

Question 21

When an object moves through a fluid, which force acts opposite to its motion?

Accepted Answer

Frictional Force

Answer

Gravity

Answer

Normal Force

Answer

Magnetic Force

Question 22

Formulate the relationship between the force applied to an object and the resulting acceleration.

Accepted Answer

Force is directly proportional to acceleration

Answer

Force is inversely proportional to acceleration

Answer

Force is independent of acceleration

Answer

Acceleration is directly proportional to the square of force

Question 23

Identify the force responsible for holding the nucleus of an atom together.

Accepted Answer

Strong Nuclear Force

Answer

Electrostatic Force

Answer

Gravitational Force

Answer

Weak Nuclear Force

Question 24

Classify 'Force' as either a vector or scalar quantity.

Accepted Answer

Force

Answer

Mass

Answer

Temperature

Answer

Time

Question 25

Which device operates on the principle of electromagnetic induction?

Accepted Answer

Transformer

Answer

Battery

Answer

Resistor

Answer

Capacitor

Question 26

The force that opposes motion between two surfaces in contact is known as:

Accepted Answer

Frictional force

Answer

Magnetic force

Answer

Gravitational force

Answer

Elastic force

Question 27

Which material has the lowest coefficient of friction?

Accepted Answer

Teflon

Answer

Rubber

Answer

Ice

Answer

Steel

Question 28

The force that attracts or repels charged particles is:

Accepted Answer

Electrostatic force

Answer

Gravitational force

Answer

Magnetic force

Answer

Frictional force

Question 29

The region around a magnet where its magnetic force is exerted is called:

Accepted Answer

Magnetic field

Answer

Magnetic domain

Answer

Magnetic pole

Answer

Magnetic dipole

Question 30

The force that is responsible for the movement of electric charges in a magnetic field is known as:

Accepted Answer

Magnetic force

Answer

Gravitational force

Answer

Frictional force

Answer

Electrostatic force

Question 31

According to Newton's second law of motion, how does the change in acceleration of a moving object relate to the force applied to it?

Accepted Answer

The change in acceleration is directly proportional to the force and opposite in direction.

Answer

The change in acceleration is inversely proportional to the force and in the same direction as the force.

Answer

The change in acceleration is perpendicular to the force and independent of its magnitude.

Answer

The change in acceleration is random and inversely proportional to the object's mass.

Question 32

Which of the following is NOT a fundamental force in physics?

Accepted Answer

Magnetic force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Weak nuclear force

Question 33

A 100 kg object experiences a gravitational force of approximately:

Accepted Answer

980 N

Answer

100 N

Answer

1000 N

Answer

9800 N

Question 34

A charged particle moving in a magnetic field experiences a force that is:

Accepted Answer

Always perpendicular to both the magnetic field and the particle's velocity

Answer

Always parallel to the magnetic field

Answer

Always perpendicular to the magnetic field

Answer

Always parallel to the particle's velocity

Question 35

Which of the following is a unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Kilogram

Question 36

The force of buoyancy acting on an object submerged in a fluid is equal to:

Accepted Answer

The weight of the fluid displaced by the object

Answer

The weight of the object

Answer

The pressure of the fluid at the object's depth times the object's volume

Answer

The density of the fluid times the object's surface area

Question 37

In a magnetic field, the direction of the force acting on a moving charged particle depends on:

Accepted Answer

both the particle's velocity and the magnetic field's direction

Answer

the particle's velocity only

Answer

the magnetic field's direction only

Question 38

Which of the following is NOT a force?

Accepted Answer

Velocity

Answer

Friction

Answer

Gravity

Answer

Electromagnetism

Question 39

How does the density of a fluid affect the strength of the buoyant force acting on an object submerged in it?

Accepted Answer

The buoyant force is directly proportional to the density of the fluid.

Answer

The buoyant force is inversely proportional to the density of the fluid.

Answer

The buoyant force is independent of the density of the fluid.

Question 40

An object is moving with a constant velocity. What can be deduced about the forces acting on it?

Accepted Answer

The net force acting on the object must be zero.

Answer

Friction is the only force acting on the object.

Answer

A force must be acting in the direction of motion.

Answer

The object is accelerating.

Question 41

A car is traveling at a constant speed on a straight road. What is the net force acting on the car?

Accepted Answer

Zero.

Answer

Equal to the force of air resistance acting on the car.

Answer

Equal to the force of friction acting on the car.

Answer

Equal to the force of gravity acting on the car.

Question 42

An object is thrown into the air. At the highest point of its trajectory, which force is primarily responsible for its motion?

Accepted Answer

Gravity.

Answer

Tension.

Answer

Friction.

Answer

Drag.

Question 43

A ball is rolling on a rough surface and slows down. Which force is primarily responsible for the reduction in its speed?

Accepted Answer

Friction.

Answer

Gravity.

Answer

Centripetal force.

Answer

Air resistance.

Question 44

Which of the following is NOT considered a contact force?

Accepted Answer

Gravity.

Answer

Normal force.

Answer

Tension.

Answer

Friction.

Question 45

The force of tension is primarily characterized as a:

Accepted Answer

Pull.

Answer

Push.

Answer

Friction.

Answer

Gravity.

Question 46

A car is traveling around a curve. Which force keeps the car from moving in a straight line?

Accepted Answer

Centripetal force.

Answer

Friction.

Answer

Gravity.

Answer

Air resistance.

Question 47

A satellite orbits the Earth. Which force is primarily responsible for keeping the satellite in orbit?

Accepted Answer

Gravitational force.

Answer

Tension force.

Answer

Frictional force.

Answer

Magnetic force.

Question 48

Two magnets with similar poles are brought near each other. The magnetic force between them is:

Accepted Answer

Repulsive

Answer

Attractive

Answer

Intermittent

Answer

Zero

Question 49

A 5 kg object is moving with a constant velocity of 10 m/s. What is the net force acting on it?

Accepted Answer

0 N

Answer

100 N

Answer

200 N

Answer

50 N

Question 50

A force of 10 N is applied to a 2 kg object. What is the acceleration of the object?

Accepted Answer

5 m/s²

Answer

10 m/s²

Answer

2 m/s²

Question 51

A car is moving at a constant speed around a circular track. Identify the force that keeps it moving in a circular path.

Accepted Answer

Centripetal force

Answer

Gravitational force

Answer

Tension force

Answer

Frictional force