Newton's Laws of Motion: Master the Fundamentals of Physics

Question 1

Which equation represents Newton's second law of motion?

Accepted Answer

F = ma

Answer

P = IV

Answer

E = mc^2

Answer

V = d/t

Question 2

Which of the following factors does NOT influence an object's momentum?

Accepted Answer

Height

Answer

Mass

Answer

Velocity

Answer

Acceleration

Question 3

A 500-kilogram car traveling at 20 m/s collides with a stationary 1000-kilogram car. Assuming this is a perfectly inelastic collision, what will be the combined velocity of the two cars after impact?

Accepted Answer

13.33 m/s

Answer

10 m/s

Answer

20 m/s

Answer

26.67 m/s

Question 4

According to Newton's laws of motion, how is the applied force on an object related to its acceleration?

Accepted Answer

The force is directly proportional to the acceleration.

Answer

The force is inversely proportional to the acceleration.

Answer

The force is equal to the acceleration.

Answer

The force is unrelated to the acceleration.

Question 5

A 1000-kilogram elevator is moving upwards at a constant velocity of 5 m/s. What is the net force acting on the elevator?

Accepted Answer

0 N

Answer

5000 N

Answer

10000 N

Answer

15000 N

Question 6

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an external force. True or False?

Accepted Answer

True

Answer

False

Question 7

Which of the following is a force that acts between two charged particles?

Accepted Answer

Electrostatic force

Answer

Friction

Answer

Gravity

Question 8

Which of the following is a unit of energy?

Accepted Answer

Joule

Answer

Newton

Answer

Kilogram

Question 9

As a satellite orbits Earth, its direction of motion is constantly changing. What force causes the satellite to move in a circular path?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Question 10

To derive Newton's second law of motion (F = ma), start with the definition of acceleration (a = dv/dt). How do you proceed?

Accepted Answer

Multiply both sides of the acceleration definition by mass (m).

Answer

Integrate both sides of the acceleration definition with respect to time.

Answer

Square both sides of the acceleration definition.

Question 11

Which scenario best illustrates Newton's first law of motion, where an object at rest stays at rest unless acted upon by an unbalanced force?

Accepted Answer

A book resting on a table

Answer

A ball rolling across a field

Answer

A car speeding up from a stop

Question 12

How do Newton's laws of motion explain the movement of a projectile, like a thrown ball?

Accepted Answer

Newton's second law explains the acceleration due to gravity, while Newton's third law explains the force of the thrower's arm on the ball.

Answer

Only Newton's first law applies because the ball is in the air and not touching the ground.

Answer

Neither of Newton's laws applies because the ball is no longer experiencing a force.

Answer

Newton's first law explains the ball's initial velocity, while Newton's third law explains its trajectory.

Question 13

Newton's first law of motion states that an object at rest will remain at rest unless acted upon by an external force. Is this statement true or false?

Accepted Answer

True

Answer

False

Question 14

Newton's third law of motion describes the relationship between forces. Which of the following is not a part of this law?

Accepted Answer

The two forces are always in the same direction

Answer

For every action, there is an equal and opposite reaction

Answer

Forces always occur in pairs

Answer

The two forces act on the same object

Question 15

Which of the following is a vector quantity?

Accepted Answer

Acceleration

Answer

Distance

Answer

Speed

Answer

Mass

Question 16

The SI unit of force is the:

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 17

Power is the rate at which work is done. Is this statement true or false?

Accepted Answer

True

Answer

False

Question 18

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

Accepted Answer

An object in motion will remain in motion with the same velocity unless acted upon by an external net force.

Answer

The rate of change of momentum of an object is proportional to the net force acting on the object.

Answer

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

Answer

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

Question 19

If the force applied to an object is tripled, what happens to its acceleration?

Accepted Answer

It triples.

Answer

It decreases by a factor of three.

Answer

It remains the same.

Answer

It increases by a factor of nine.

Question 20

Which of the following is NOT a consequence of Newton's third law of motion?

Accepted Answer

The force of a hammer hitting a nail is greater than the force of the nail resisting the hammer.

Answer

Rockets propel themselves by expelling exhaust gases.

Answer

When you walk, you push back on the ground with the same force as the ground pushes you forward.

Answer

A book sitting on a table exerts an equal and opposite force on the table as the table exerts on the book.

Question 21

Which of the following is the SI unit of acceleration?

Accepted Answer

m/s2

Answer

m/s

Answer

km/h

Answer

N

Question 22

A cyclist traveling at a speed of 25 m/s applies the brakes and comes to a complete stop in 6 seconds. What is the acceleration of the cyclist?

Accepted Answer

4 m/s2

Answer

1 m/s2

Answer

10 m/s2

Answer

25 m/s2

Question 23

Which of the following is a vector quantity?

Accepted Answer

Acceleration

Answer

Distance

Answer

Speed

Answer

Mass

Question 24

A projectile is launched vertically upward with an initial velocity of 12 m/s. What maximum height will it reach?

Accepted Answer

18 m

Answer

6 m

Answer

12 m

Answer

24 m

Question 25

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

Accepted Answer

0 m/s

Answer

5 m/s

Answer

10 m/s

Answer

15 m/s

Question 26

Which of the following is NOT a unit of force?

Accepted Answer

Joule

Answer

Newton

Answer

Kilogram

Answer

Pound

Question 27

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

Accepted Answer

2 m/s²

Answer

1 m/s²

Answer

5 m/s²

Answer

10 m/s²

Question 28

Momentum is a conserved quantity in the absence of external forces.

Accepted Answer

True

Answer

False

Question 29

Which of the following is a vector quantity?

Accepted Answer

Acceleration

Answer

Distance

Answer

Speed

Answer

Temperature

Question 30

Newton's laws of motion are applicable to objects of all sizes and masses, from subatomic particles to celestial bodies.

Accepted Answer

True

Answer

False

Question 31

How does the work done by a force relate to the change in kinetic energy of an object?

Accepted Answer

Work done equals the change in kinetic energy.

Answer

Work done is always positive and increases kinetic energy.

Answer

Work done equals the power applied.

Answer

Change in kinetic energy is always positive.

Question 32

According to the impulse-momentum theorem, how are impulse and momentum related?

Accepted Answer

Impulse is the rate of change of momentum.

Answer

Momentum is the rate of change of impulse.

Answer

Impulse and momentum are unrelated quantities.

Question 33

The force that opposes the relative motion of an object through a fluid is called:

Accepted Answer

Drag

Answer

Friction

Answer

Gravity

Answer

Centripetal force

Question 34

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Accepted Answer

True

Answer

False

Question 35

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

Accepted Answer

Frictional force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Weak nuclear force

Question 36

The force that keeps a satellite in a circular orbit around Earth is:

Accepted Answer

Centripetal force

Answer

Gravity

Answer

Tension

Answer

Electromagnetic force

Question 37

According to Newton's First Law of Motion, an object at rest will remain at rest, or an object in motion will remain in motion at a constant velocity, if:

Accepted Answer

no net force acts upon it

Answer

the force acting on it is greater than the force opposing it

Answer

a force acts on it but is balanced by an equal and opposite force

Answer

the force acting on it is less than the force opposing it

Question 38

Which of the following is the SI unit for acceleration?

Accepted Answer

m/s²

Answer

N

Answer

m/s

Answer

km/h

Question 39

Which of the following is NOT a force?

Accepted Answer

Energy

Answer

Friction

Answer

Gravity

Question 40

According to Newton's Third Law, for every action, there is an:

Accepted Answer

equal and opposite reaction

Answer

greater and opposite reaction

Answer

no reaction

Answer

lesser and opposite reaction

Question 41

Which of the following is a vector quantity?

Accepted Answer

Force

Answer

Time

Answer

Energy

Answer

Mass

Question 42

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

Accepted Answer

Temperature

Answer

Contact area

Answer

Coefficient of friction

Answer

Surface roughness

Question 43

A book is at rest on a table. Which statement correctly describes the book's motion and the forces acting on it?

Accepted Answer

The book is in equilibrium, with an upward normal force from the table equal in magnitude and opposite in direction to the downward force of gravity.

Answer

The book is accelerating upward due to the upward force from the table.

Question 44

A 10 kg object experiences a net force of 20 N. What is the object's acceleration?

Accepted Answer

2 m/s²

Answer

0.5 m/s²

Answer

20 m/s²

Question 45

A rocket moves forward by expelling hot gases out of its engines. Which of Newton's laws best describes this action?

Accepted Answer

Newton's Third Law

Answer

Newton's Second Law

Answer

Newton's Law of Universal Gravitation

Question 46

A car of mass 1500 kg accelerates from rest to 20 m/s in 5 seconds. What is the magnitude of the net force acting on the car?

Accepted Answer

6000 N

Answer

15000 N

Answer

1500 N

Question 47

Two objects of equal masses are dropped from the same height, neglecting air resistance. Which statement describes their motion?

Accepted Answer

Both objects will experience the same constant acceleration due to gravity.

Answer

The heavier object will experience greater acceleration.

Question 48

A hockey puck slides across a frictionless ice rink. What is the net force acting on the puck after it is in motion?

Accepted Answer

Zero

Answer

The force of gravity on the puck

Answer

A constant force equal to the initial force applied

Question 49

You are pushing a heavy box across the floor at a constant velocity. Which of the following statements is true about the forces acting on the box?

Accepted Answer

The force you apply is equal in magnitude and opposite in direction to the force of friction.

Answer

The force you apply is greater than the force of friction.

Answer

The force you apply is less than the force of friction.

Question 50

Two masses, m1 and m2, are separated by a distance r. What would happen to the gravitational force between them if the distance becomes twice the initial value?

Accepted Answer

The force decreases by a factor of four.

Answer

The force increases by a factor of sixteen.

Answer

The force remains the same.

Question 51

A skydiver jumps out of a plane and reaches terminal velocity. What is her acceleration?

Accepted Answer

Zero, as the net force acting on her is zero.

Answer

Constant, as the net force acting on her is constant.