Motion and Forces: Master the Fundamentals of Physics

Question 1

Which of the following accurately states Newton's first law of motion?

Accepted Answer

An object remains motionless unless acted upon by an external force.

Answer

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

Answer

Every action has an equal and opposite reaction.

Question 2

Identify the SI unit of momentum.

Accepted Answer

Kilogram-meter per second

Answer

Newton-meter

Answer

Joule

Answer

Watt

Question 3

The principle behind rocket propulsion involves the conservation of:

Accepted Answer

Momentum

Answer

Mass

Answer

Energy

Answer

Angular momentum

Question 4

Which equation represents the potential energy due to gravitational force?

Accepted Answer

Ep = mgh

Answer

Ek = 1/2 mv^2

Answer

W = Fd

Answer

P = Fv

Question 5

A ball is thrown horizontally off a cliff with an initial speed of 10 m/s. Determine its initial vertical velocity component.

Accepted Answer

0 m/s

Answer

10 m/s

Answer

-10 m/s

Answer

5 m/s

Question 6

A car with a mass of 1000 kg is traveling at a speed of 20 m/s. What force is necessary to stop the car in a distance of 50 m?

Accepted Answer

80 kN

Answer

40 kN

Answer

160 kN

Question 7

Which type of friction opposes the motion of two surfaces in contact when they are not moving relative to each other?

Accepted Answer

Static friction

Answer

Kinetic friction

Answer

Sliding friction

Question 8

Which energy source is considered renewable?

Accepted Answer

Solar energy

Answer

Fossil fuels

Answer

Nuclear energy

Question 9

What is the key difference between a conductor and an insulator?

Accepted Answer

Conductors allow electric current to flow easily, while insulators do not.

Answer

Conductors do not allow electric current to flow easily, while insulators do.

Answer

Conductors are made of metal, while insulators are made of plastic.

Question 10

Which of the following is not a fundamental force in nature?

Accepted Answer

Mental force

Answer

Gravitational force

Answer

Frictional force

Answer

Electrical force

Question 11

According to Newton's second law of motion, how does the acceleration of an object relate to the force applied to it and its mass?

Accepted Answer

Acceleration is directly proportional to the force applied and inversely proportional to the mass.

Answer

Acceleration is directly proportional to the mass and inversely proportional to the force applied.

Answer

Force applied is directly proportional to both acceleration and mass.

Answer

Force applied is inversely proportional to both acceleration and mass.

Question 12

Which of the following is a vector quantity that describes both magnitude and direction?

Accepted Answer

Velocity

Answer

Distance

Answer

Mass

Answer

Time

Question 13

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

Its mass

Answer

Its displacement

Answer

Its momentum

Question 14

Which of the following is the SI unit for energy?

Accepted Answer

Joule

Answer

Newton

Answer

Metre per second

Answer

Kilogram

Question 15

An object is moving in a circular path at a constant speed. Which of the following forces is acting on the object?

Accepted Answer

Centripetal force

Answer

Friction

Answer

Gravity

Answer

Normal force

Question 16

What is the work done when a 20 kg object is lifted vertically through a distance of 5 m?

Accepted Answer

200 J

Answer

100 J

Answer

500 J

Answer

1000 J

Question 17

Which statement is not one of Newton's laws of motion?

Accepted Answer

The force of gravity increases as two objects move closer together.

Answer

An object at rest stays at rest, or, if in motion, stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Answer

The acceleration of an object depends on the mass of the object and the amount of force applied; the greater the mass (of the object) and the greater the force, the greater the acceleration.

Answer

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

Question 18

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Time

Question 19

A ball is rolling down an inclined plane. During this process, which of the following energy transformations occurs?

Accepted Answer

Gravitational potential energy is converted into kinetic energy.

Answer

Kinetic energy is converted into gravitational potential energy.

Answer

Both kinetic and gravitational potential energy remain constant.

Answer

Kinetic energy and gravitational potential energy both decrease.

Question 20

What is the SI unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 21

Which of the following is NOT a type of force?

Accepted Answer

Potential energy

Answer

Gravitational force

Answer

Magnetic force

Answer

Frictional force

Question 22

The work done by a force equals the force multiplied by the:

Accepted Answer

Distance moved in the direction of the force

Answer

Distance moved perpendicular to the force

Answer

Mass of the object

Answer

Acceleration of the object

Question 23

Momentum is a vector quantity that describes an object's:

Accepted Answer

Mass and velocity

Answer

Weight and acceleration

Answer

Force and displacement

Answer

Energy and power

Question 24

Which of the following does NOT affect the magnitude of gravitational force between two objects?

Accepted Answer

Speed of the objects

Answer

Mass of the objects

Answer

Distance between the objects

Answer

Presence of other objects nearby

Question 25

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Temperature

Answer

Mass

Answer

Time

Question 26

An object with a mass of 5 kilograms is moving at a velocity of 10 meters per second. What is its momentum?

Accepted Answer

50 kilogram meters per second

Answer

15 kilogram meters per second

Answer

50 meters per second

Answer

15 meters per second

Question 27

Which of the following forces is conservative?

Accepted Answer

Gravity

Answer

Friction

Answer

Air resistance

Answer

Tension

Question 28

What is the kinetic energy of an object with a mass of 10 kilograms and a velocity of 5 meters per second?

Accepted Answer

50 joules

Answer

25 joules

Answer

100 joules

Answer

200 joules

Question 29

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 30

What is the fundamental relationship between force, mass, and acceleration?

Accepted Answer

F = ma

Answer

F = m/a

Answer

a = F/m

Answer

a = m/F

Question 31

Which of the following is an example of projectile motion?

Accepted Answer

A ball thrown in the air

Answer

A car driving on a straight road

Answer

A book falling off a table

Answer

A person walking in a park

Question 32

Which physical quantity is NOT a vector?

Accepted Answer

Speed

Answer

Velocity

Answer

Acceleration

Answer

Displacement

Question 33

According to Newton's third law of motion, for every action, there is an equal and opposite:

Accepted Answer

Reaction

Answer

Force

Answer

Motion

Answer

Energy

Question 34

A car with a mass of 1000 kg is traveling at a speed of 10 m/s. Calculate its kinetic energy.

Accepted Answer

5000 J

Answer

500 J

Answer

1000 J

Answer

10000 J

Question 35

According to Newton's first law of motion, what will happen to an object at rest?

Accepted Answer

It will remain at rest unless acted upon by an unbalanced force.

Answer

It will remain at rest unless acted upon by a balanced force.

Answer

It will remain at rest unless acted upon by a gravitational force.

Answer

It will remain at rest unless acted upon by a frictional force.

Question 36

What is the SI unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 37

From Newton's laws of motion, which statement is incorrect?

Accepted Answer

Energy can be created or destroyed.

Answer

An object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Answer

The acceleration of an object is directly proportional to the force acting on the object, and inversely proportional to its mass.

Answer

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

Question 38

Which of the following is the unit of energy?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 39

A ball is thrown upwards with a velocity of 10 m/s. What will be its velocity when it reaches its maximum height?

Accepted Answer

0 m/s

Answer

5 m/s

Answer

10 m/s

Answer

15 m/s

Question 40

A force of 40 Newtons is applied at an angle of 45° to the horizontal. What is the horizontal component of the force?

Accepted Answer

28.3 N

Answer

20 N

Answer

40 N

Answer

56.6 N

Question 41

A ball is thrown vertically upwards with a velocity of 10 m/s. At the highest point of its trajectory, its velocity is:

Accepted Answer

0 m/s

Answer

5 m/s

Answer

10 m/s

Answer

-10 m/s

Question 42

Which of the following forces is a non-contact force?

Accepted Answer

Gravitational force

Answer

Normal force

Answer

Friction

Answer

Tension

Question 43

A car maintains a constant speed of 20 m/s. What is its acceleration?

Accepted Answer

0 m/s²

Answer

20 m/s²

Answer

40 m/s²

Answer

10 m/s²

Question 44

A 10 kg object experiences a net force of 50 N. Calculate its acceleration.

Accepted Answer

5 m/s²

Answer

500 m/s²

Answer

10 m/s²

Answer

0.2 m/s²

Question 45

A ball is propelled vertically upwards. At its highest point, what is its velocity?

Accepted Answer

0 m/s

Answer

-9.8 m/s

Answer

9.8 m/s

Question 46

An object at rest has a mass of 5 kg. Calculate its momentum.

Accepted Answer

0 kg m/s

Answer

The momentum cannot be determined.

Answer

5 kg m/s

Answer

25 kg m/s

Question 47

A car travels at 10 m/s and then accelerates to 20 m/s in 5 seconds. Calculate its average acceleration.

Accepted Answer

2 m/s²

Answer

1 m/s²

Answer

10 m/s²

Answer

5 m/s²

Question 48

A 2 kg object moving at 5 m/s collides with a stationary object of mass 3 kg. After the collision, the two objects stick together. Calculate their combined velocity.

Accepted Answer

2 m/s

Answer

5 m/s

Answer

1 m/s

Answer

3 m/s

Question 49

Which of the following is not a form of energy?

Accepted Answer

Force

Answer

Thermal

Answer

Kinetic

Answer

Potential

Question 50

A ball is dropped from a height. As it falls, its gravitational potential energy...

Accepted Answer

Decreases

Answer

Increases

Answer

Remains constant

Question 51

Which of the following is an example of a non-contact force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Normal force

Question 52

A car traveling at 30 m/s applies the brakes and comes to a stop in 5 seconds. Calculate the car's average deceleration.

Accepted Answer

-6 m/s²

Answer

-150 m/s²

Answer

6 m/s²

Answer

150 m/s²