Newtons First Law

Question 1

What is Newton’s First Law of Motion?

Answer 1

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Question 2

Fill in the blank: The force required to change the motion of an object is called ______.

Answer 2

net force

Question 3

True or False: Mass and weight are the same thing.

Answer 3

False

Question 4

What is the formula for calculating force according to Newton’s Second Law of Motion?

Answer 4

F = ma (Force equals mass times acceleration)

Question 5

Which of the following is a unit of force? A) Joule B) Newton C) Pascal

Answer 5

B) Newton

Question 6

What does the term ‘inertia’ refer to?

Answer 6

The tendency of an object to resist changes in its state of motion.

Question 7

Define Newton’s Third Law of Motion.

Answer 7

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

Question 8

Short Answer: What is the relationship between mass and acceleration when force is constant?

Answer 8

As mass increases, acceleration decreases.

Question 9

Fill in the blank: The gravitational force acting on an object is also known as its ______.

Answer 9

weight

Question 10

True or False: An object can have a net force acting on it while moving at a constant velocity.

Answer 10

False

Question 11

What is the acceleration of an object if a net force of 10 N is applied to an object with a mass of 2 kg?

Answer 11

5 m/s²

Question 12

Which law states that the acceleration of an object is directly proportional to the net force acting on it?

Answer 12

Newton’s Second Law of Motion

Question 13

Multiple Choice: What is the unit of mass? A) Kilogram B) Meter C) Second

Answer 13

A) Kilogram

Question 14

What is meant by ‘free fall’?

Answer 14

The motion of an object under the influence of gravitational force only.

Question 15

Fill in the blank: The ______ of an object is a measure of the amount of matter it contains.

Answer 15

mass

Question 16

True or False: A heavier object will fall faster than a lighter object in a vacuum.

Answer 16

False

Question 17

What is the effect of friction on motion?

Answer 17

Friction opposes the motion of objects.

Question 18

Short Answer: What happens to the acceleration of an object if the net force acting on it is doubled?

Answer 18

The acceleration doubles.

Question 19

Define ‘net force’.

Answer 19

The vector sum of all forces acting on an object.

Question 20

Which of the following does not affect the motion of an object? A) Mass B) Distance C) Net force

Answer 20

B) Distance

Question 21

What is the principle of conservation of momentum?

Answer 21

In a closed system, the total momentum before an interaction is equal to the total momentum after the interaction.

Question 22

Fill in the blank: The slope of a velocity-time graph represents ______.

Answer 22

acceleration

Question 23

True or False: A constant net force results in constant acceleration.

Answer 23

True

Question 24

What is the significance of the coefficient of friction?

Answer 24

It represents the ratio of the force of friction between two bodies and the force pressing them together.

Question 25

Multiple Choice: What does a flat line on a distance-time graph indicate? A) Constant speed B) At rest C) Accelerating

Answer 25

B) At rest

Question 26

Short Answer: How does increasing the mass of an object affect its acceleration for a given force?

Answer 26

It decreases the acceleration.

Question 27

What is Newton's first law of motion?

Answer 27

An object at rest stays at rest and an object in motion stays in motion unless acted upon by a net external force.

Question 28

True or False: Inertia is the tendency of an object to resist changes in its state of motion.

Answer 28

True

Question 29

Fill in the blank: The _______ of an object is directly proportional to the net force acting on it.

Answer 29

acceleration

Question 30

What does Newton's second law of motion state?

Answer 30

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

Question 31

What is the formula for Newton's second law of motion?

Answer 31

F = ma, where F is the net force, m is the mass, and a is the acceleration.

Question 32

What is the unit of force in the SI system?

Answer 32

Newton (N)

Question 33

True or False: Weight is the measure of the force of gravity acting on an object.

Answer 33

True

Question 34

What is the relationship between mass and weight?

Answer 34

Weight is the product of mass and the acceleration due to gravity (W = mg).

Question 35

What does Newton's third law of motion state?

Answer 35

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

Question 36

Fill in the blank: The law of conservation of momentum states that the total momentum of a closed system remains ______.

Answer 36

constant

Question 37

What is the principle behind the concept of action and reaction?

Answer 37

For every force exerted, there is an equal force exerted in the opposite direction.

Question 38

What is the acceleration due to gravity on Earth?

Answer 38

Approximately 9.81 m/s².

Question 39

True or False: An object moving in a circular path is accelerating.

Answer 39

True

Question 40

What is centripetal force?

Answer 40

The force that acts on an object moving in a circular path, directed towards the center of the circle.

Question 41

Fill in the blank: The _______ of an object is a measure of the amount of matter it contains.

Answer 41

mass

Question 42

What is the difference between mass and weight?

Answer 42

Mass is a measure of the amount of matter, while weight is the force of gravity acting on that mass.

Question 43

What is an example of a non-contact force?

Answer 43

Gravitational force.

Question 44

True or False: Friction always opposes motion.

Answer 44

True

Question 45

What factors affect the amount of friction between two surfaces?

Answer 45

The nature of the surfaces and the normal force acting between them.

Question 46

What is static friction?

Answer 46

The frictional force that prevents two surfaces from sliding past each other.

Question 47

Fill in the blank: Kinetic friction is less than ______ friction.

Answer 47

static

Question 48

What is the formula for calculating momentum?

Answer 48

p = mv, where p is momentum, m is mass, and v is velocity.

Question 49

True or False: Momentum is a scalar quantity.

Answer 49

False

Question 50

What happens to the momentum of a system if no external forces act on it?

Answer 50

The total momentum remains constant.

Question 51

What is the unit of momentum?

Answer 51

Kilogram meter per second (kg·m/s)

Question 52

What is the relationship between impulse and momentum?

Answer 52

Impulse is equal to the change in momentum.

Question 53

Fill in the blank: The _______ of an object is its resistance to change in motion.

Answer 53

inertia

Question 54

What is the effect of mass on acceleration according to Newton's second law?

Answer 54

Greater mass results in less acceleration for the same applied force.

Question 55

True or False: An object can have a large mass but low weight in a microgravity environment.

Answer 55

False

Question 56

What is the formula for calculating weight?

Answer 56

W = mg, where W is weight, m is mass, and g is the acceleration due to gravity.

Question 57

What is an example of a contact force?

Answer 57

Friction.

Question 58

What type of motion does a freely falling object undergo?

Answer 58

Uniformly accelerated motion.

Question 59

Fill in the blank: The force that causes an object to accelerate is called ______.

Answer 59

net force

Question 60

What does the term 'net force' refer to?

Answer 60

The vector sum of all forces acting on an object.

Question 61

True or False: An object in equilibrium has a net force of zero.

Answer 61

True

Question 62

What is the first step in solving a problem using Newton's laws?

Answer 62

Identify all the forces acting on the object.

Question 63

What is a free body diagram?

Answer 63

A graphical representation of all the forces acting on an object.

Question 64

Fill in the blank: In a free body diagram, forces are represented as ______.

Answer 64

arrows

Question 65

What is the role of air resistance in motion?

Answer 65

It opposes the motion of an object moving through the air.

Question 66

True or False: A heavier object falls faster than a lighter object in a vacuum.

Answer 66

False

Question 67

What does it mean for a system to be isolated?

Answer 67

No external forces are acting on the system.

Question 68

What is terminal velocity?

Answer 68

The constant speed achieved by an object when the force of gravity is balanced by air resistance.

Question 69

Fill in the blank: The law of universal gravitation states that every point mass attracts every other point mass with a force ______ proportional to the product of their masses and inversely proportional to the square of the distance between them.

Answer 69

directly

Question 70

What is the gravitational constant?

Answer 70

Approximately 6.674 × 10⁻¹¹ N(m/kg)².

Question 71

True or False: Gravity is a contact force.

Answer 71

False

Question 72

What is the effect of an unbalanced force on an object?

Answer 72

It causes the object to accelerate.

Question 73

Fill in the blank: The greater the distance between two objects, the ______ the gravitational force between them.

Answer 73

weaker

Question 74

What is a scalar quantity?

Answer 74

A quantity that has only magnitude and no direction.

Question 75

What is a vector quantity?

Answer 75

A quantity that has both magnitude and direction.

Question 76

Fill in the blank: The acceleration due to gravity varies with ______.

Answer 76

altitude

Question 77

What is the value of gravitational acceleration at the surface of the Moon?

Answer 77

Approximately 1.62 m/s².

Question 78

True or False: A projectile follows a parabolic path due to the influence of gravity.

Answer 78

True

Question 79

What is the effect of mass on gravitational force?

Answer 79

Greater mass results in a stronger gravitational force.

Question 80

Fill in the blank: The _______ of an object is the measure of the gravitational force acting on it.

Answer 80

weight

Question 81

What is the relationship between force, mass, and acceleration in a system?

Answer 81

Net force is equal to mass times acceleration (F = ma).

Question 82

What is the significance of the slope of a distance-time graph?

Answer 82

It represents the speed of the object.

Question 83

Fill in the blank: The area under a velocity-time graph represents ______.

Answer 83

displacement

Question 84

What is the formula for calculating work done?

Answer 84

Work = Force × Distance × cos(θ), where θ is the angle between the force and the direction of motion.

Question 85

True or False: Work can be done when there is no movement.

Answer 85

False

Question 86

What is the unit of work in the SI system?

Answer 86

Joule (J)

Question 87

What is kinetic energy?

Answer 87

The energy of an object due to its motion.

Question 88

What is the formula for kinetic energy?

Answer 88

KE = 1/2 mv², where m is mass and v is velocity.

Question 89

Fill in the blank: Potential energy is the energy stored in an object due to its ______.

Answer 89

position

Question 90

What is gravitational potential energy?

Answer 90

The energy stored in an object as a result of its height above the ground.

Question 91

What is the formula for gravitational potential energy?

Answer 91

PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Question 92

True or False: Energy can be created or destroyed.

Answer 92

False

Question 93

What is the principle of conservation of energy?

Answer 93

Energy cannot be created or destroyed, only transformed from one form to another.

Question 94

What is the relationship between work done and energy?

Answer 94

Work done on an object results in a change in its energy.

Question 95

Fill in the blank: The total mechanical energy of a system is the sum of its ______ and ______ energy.

Answer 95

kinetic, potential

Question 96

What is the effect of friction on mechanical energy?

Answer 96

Friction converts mechanical energy into thermal energy, reducing total mechanical energy.

Question 97

True or False: An object in free fall has only potential energy.

Answer 97

False

Question 98

What happens to the potential energy of an object as it falls?

Answer 98

It decreases while its kinetic energy increases.