Motion and Forces: Master the Fundamentals of Physics

Question 1

Machines A and B perform the same amount of work. However, Machine A takes twice the time as Machine B to complete the task. How do their power outputs compare?

Accepted Answer

Machine B has twice the power output as Machine A.

Answer

Machine A has twice the power output as Machine B.

Answer

The power outputs of Machine A and Machine B are the same.

Answer

Insufficient information is provided to determine the power outputs.

Question 2

Explain how the impulse acting on an object influences its momentum, and provide real-world examples to illustrate the concept.

Accepted Answer

Impulse, which is calculated as force multiplied by time, directly affects an object's momentum, resulting in a change in its velocity.

Answer

Impulse only affects an object's velocity, while momentum is determined solely by its mass.

Answer

Impulse is unrelated to momentum but is solely responsible for determining an object's acceleration.

Question 3

What is the unit of measure for force in the SI system?

Accepted Answer

Newton (N)

Answer

Kilogram (kg)

Answer

Meter (m)

Answer

Joule (J)

Question 4

Which of the following factors affects the force of gravity between two objects?

Accepted Answer

Both mass and distance

Answer

Mass of the objects

Answer

Distance between the objects

Answer

Shape of the objects

Question 5

What is the term for the rate at which an object's velocity changes?

Accepted Answer

Acceleration

Answer

Velocity

Answer

Displacement

Answer

Momentum

Question 6

Which of the following is NOT a factor that affects the momentum of an object?

Accepted Answer

Volume of the object

Answer

Mass of the object

Answer

Velocity of the object

Answer

Direction of the object's motion

Question 7

What is the relationship between work done on an object and the object's energy?

Accepted Answer

Work is done when energy is transferred or transformed.

Answer

Work decreases the energy of an object.

Answer

Work is only done when an object is moving.

Answer

Work is not related to the energy of an object.

Question 8

Which of the following is a potential energy?

Accepted Answer

Energy stored in an object due to its height

Answer

Energy of a moving object

Answer

Energy of a current flowing through a wire

Answer

Sound energy

Question 9

What is the third law of motion according to Newton?

Accepted Answer

For every action, there is an equal and opposite reaction.

Answer

The force of an object on a surface is equal to the force of the surface on the object.

Answer

An object's acceleration is proportional to the force applied to it.

Answer

Energy cannot be created or destroyed.

Question 10

An object is at rest when it:

Accepted Answer

Has no motion

Answer

Has constant motion

Answer

Has constant acceleration

Answer

Has non-zero displacement

Question 11

According to Newton's first law of motion, an object in motion will continue moving with the same speed and direction unless acted upon by:

Accepted Answer

An external force

Answer

Friction

Answer

Gravity

Answer

Inertia

Question 12

Which of the following is a non-contact force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Normal force

Question 13

The SI unit of force is the:

Accepted Answer

Newton (N)

Answer

Kilogram (kg)

Answer

Meter (m)

Answer

Joule (J)

Question 14

In an elastic collision, which of the following quantities is conserved?

Accepted Answer

Both momentum and energy

Answer

Momentum only

Answer

Energy only

Answer

Neither momentum nor energy

Question 15

A car travels a distance of 100 kilometers in 2 hours. What is its average speed?

Accepted Answer

50 km/h

Answer

25 km/h

Answer

100 km/h

Answer

200 km/h

Question 16

Which of the following is a vector quantity?

Accepted Answer

Displacement

Answer

Mass

Answer

Temperature

Answer

Time

Question 17

The force of gravity between two objects is directly proportional to:

Accepted Answer

The masses of the objects and the square of the distance between them

Answer

The masses of the objects

Answer

The distance between the objects

Answer

The mass of one object and the distance between them

Question 18

As a roller coaster navigates its track, it ascends, descends, and traverses loops. Which energy forms are involved, and how do they transform during the ride?

Accepted Answer

Kinetic, Potential, Internal

Answer

Kinetic, Elastic, Electrical

Answer

Heat, Sound, Light

Question 19

According to Newton's second law of motion, the acceleration of an object is directly proportional to:

Accepted Answer

Force and mass

Answer

Mass and velocity

Answer

Force and velocity

Answer

Mass and acceleration

Question 20

Which of the following is a non-contact force, meaning it acts between objects that are not touching?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Normal force

Question 21

The momentum of an object is equal to its:

Accepted Answer

Mass multiplied by velocity

Answer

Force multiplied by displacement

Answer

Energy multiplied by time

Answer

Acceleration multiplied by velocity

Question 22

Which of the following is a form of potential energy, meaning it is stored energy?

Accepted Answer

Elastic energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Sound energy

Question 23

The work done by a force is equal to the:

Accepted Answer

Force multiplied by distance moved in the direction of the force

Answer

Mass multiplied by acceleration

Answer

Energy multiplied by time

Answer

Momentum multiplied by velocity

Question 24

Which of the following is the SI unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 25

A car traveling at a constant speed has:

Accepted Answer

Zero acceleration

Answer

Positive acceleration

Answer

Negative acceleration

Answer

Variable acceleration

Question 26

What is the unit of force in the International System of Units (SI)?

Accepted Answer

Newton (N)

Answer

Kilogram (kg)

Answer

Meter (m)

Question 27

According to Newton's second law of motion, an object's acceleration is directly proportional to:

Accepted Answer

The net force acting on it

Answer

The time elapsed

Answer

The mass of the object

Answer

The velocity of the object

Question 28

Which of the following best describes the motion of a projectile near Earth's surface?

Accepted Answer

Initial upward velocity and curved trajectory

Answer

Simple harmonic motion and constant frequency

Answer

Constant upward acceleration and straight-line path

Answer

Uniform circular motion and constant speed

Question 29

Friction is a force that:

Accepted Answer

Opposes the motion of two surfaces in contact

Answer

Acts only on objects moving in a fluid

Answer

Is larger for heavier objects

Answer

Always acts in the direction of motion

Question 30

On Earth, the acceleration due to gravity (g) is approximately:

Accepted Answer

9.8 m/s²

Answer

19.6 m/s²

Answer

0.98 m/s²

Answer

29.4 m/s²

Question 31

Momentum is defined as:

Accepted Answer

The product of an object's mass and velocity

Answer

The product of an object's acceleration and force

Answer

The quotient of an object's velocity by its mass

Answer

The ratio of an object's mass to its velocity

Question 32

Work is done when:

Accepted Answer

A force is applied to an object and causes it to move

Answer

An object is held stationary against a force

Answer

A force is applied to an object but does not cause it to move

Question 33

What is potential energy?

Accepted Answer

Energy stored by an object or system due to its position or state

Answer

Energy in motion

Answer

Energy used to do work

Answer

Energy released by chemical reactions

Question 34

The total mechanical energy of an isolated system remains:

Accepted Answer

Constant, in the absence of non-conservative forces

Answer

Always increasing

Answer

Always decreasing

Question 35

According to Newton's second law of motion, an object's acceleration is proportional to what factor?

Accepted Answer

Net force acting on the object

Answer

Coefficient of friction

Answer

Object's mass

Question 36

Which SI unit is used to measure force?

Accepted Answer

Newton

Answer

Second

Answer

Meter

Answer

Joule

Question 37

A car travels at a steady speed of 60 km/h. It experiences a force of air resistance. What will happen to the car's motion if the air resistance force is abruptly doubled?

Accepted Answer

It will decelerate

Answer

It will accelerate

Answer

It will continue at the same speed

Answer

It will stop

Question 38

A ball is thrown vertically upwards with an initial velocity of 10 m/s. What will be the ball's velocity at the highest point of its trajectory?

Accepted Answer

0 m/s

Answer

10 m/s

Answer

-10 m/s

Answer

5 m/s

Question 39

A roller coaster car rolls down a hill and then ascends another hill of the same height. At the bottom of the first hill, the car has 100 J of kinetic energy. What is its potential energy at the top of the second hill?

Accepted Answer

100 J

Answer

200 J

Answer

0 J

Answer

50 J

Question 40

The SI unit for measuring work is called what?

Accepted Answer

Joule

Answer

Newton

Answer

Pascal

Answer

Watt

Question 41

Which fundamental force is primarily responsible for the planets orbiting the sun?

Accepted Answer

Gravity

Answer

Friction

Answer

Nuclear force

Answer

Electromagnetism

Question 42

A car moving at a constant speed encounters a sudden need to brake, causing it to come to a stop. What best describes the car's motion during this braking period?

Accepted Answer

The car is decelerating.

Answer

The car is moving with constant velocity.

Answer

The car remains at rest.

Answer

The car is accelerating.

Question 43

An object with a mass of 10 kilograms is acted upon by a force of 20 Newtons. What is the object's resulting acceleration?

Accepted Answer

2 m/s²

Answer

20 m/s²

Answer

0.5 m/s²

Answer

10 m/s²

Question 44

A roller coaster reaches its peak speed at the highest point of its track. Which form of energy is most significant at this moment?

Accepted Answer

Kinetic energy

Answer

Chemical energy

Answer

Thermal energy

Answer

Potential energy

Question 45

A heavy box is being pushed across a rough surface. Which of the following factors does NOT influence the amount of friction?

Accepted Answer

The color of the box

Answer

The roughness of the surface

Answer

The weight of the box

Question 46

An object with a mass of 1 kilogram traveling at a speed of 5 meters per second collides with a stationary object. What is the momentum of the first object just before the collision occurs?

Accepted Answer

5 kg m/s

Answer

0 kg m/s

Answer

25 kg m/s

Answer

1 kg m/s

Question 47

Which of the following is an example of a force that can act over a distance without physical contact?

Accepted Answer

Gravity

Answer

Tension

Answer

Friction

Answer

Normal force

Question 48

A person lifts a 20 kilogram box from the ground to a shelf that is 1 meter above the ground. How much work is done in this process?

Accepted Answer

196 Joules

Answer

40 Joules

Answer

9.8 Joules

Answer

20 Joules

Question 49

A vehicle is traveling at a constant speed of 20 meters per second. Which of the following statements about its motion is accurate?

Accepted Answer

The car has constant velocity.

Answer

The car is decelerating.

Answer

The car is accelerating.

Answer

The car is at rest.

Question 50

Two objects, one with a mass of 1 kilogram and the other with a mass of 2 kilograms, are dropped simultaneously from the same height. Which object will reach the ground first?

Accepted Answer

They will reach the ground at the same time.

Answer

The object with a mass of 2 kilograms

Answer

The object with a mass of 1 kilogram