Newton's Laws Of Motion Physics

Question 1

What is the definition of force?

Answer 1

A force is a push or pull acting upon an object as a result of its interaction with another object.

Question 2

What is the SI unit of force?

Answer 2

The SI unit of force is the Newton (N).

Question 3

True or False: Force can only act on an object that is in motion.

Answer 3

False

Question 4

Fill in the blank: Force is a vector quantity, which means it has both __________ and __________.

Answer 4

magnitude, direction

Question 5

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

Answer 5

Newton’s Second Law of Motion

Question 6

What is the formula for calculating force?

Answer 6

Force (F) = mass (m) × acceleration (a)

Question 7

What is inertia?

Answer 7

Inertia is the tendency of an object to resist changes in its state of motion.

Question 8

True or False: A force can change the shape of an object.

Answer 8

True

Question 9

What type of forces are gravity and friction categorized as?

Answer 9

Non-contact forces and contact forces, respectively.

Question 10

What is the net force?

Answer 10

The net force is the vector sum of all the forces acting on an object.

Question 11

Fill in the blank: The force of gravity acting on an object is known as its __________.

Answer 11

weight

Question 12

What is the principle of superposition of forces?

Answer 12

The principle states that the total force acting on a body is the vector sum of all individual forces acting on it.

Question 13

True or False: Forces can only be exerted by physical contact.

Answer 13

False

Question 14

What is a contact force?

Answer 14

A contact force is a force that acts on an object through direct physical contact.

Question 15

What is a non-contact force?

Answer 15

A non-contact force is a force that acts on an object without physical contact, such as gravitational or electromagnetic forces.

Question 16

What does it mean for forces to be balanced?

Answer 16

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Question 17

What is friction?

Answer 17

Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact.

Question 18

Fill in the blank: The force that pulls objects toward the center of the Earth is called __________.

Answer 18

gravity

Question 19

What is the difference between static and kinetic friction?

Answer 19

Static friction acts on an object at rest, while kinetic friction acts on an object in motion.

Question 20

What is the formula for weight?

Answer 20

Weight (W) = mass (m) × gravitational acceleration (g)

Question 21

True or False: An object can have a net force of zero and still be moving.

Answer 21

True

Question 22

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

Answer 22

An unbalanced force causes an object to accelerate in the direction of the net force.

Question 23

What does Newton’s First Law of Motion state?

Answer 23

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

Question 24

What is an example of a non-contact force?

Answer 24

Gravity

Question 25

What is the relationship between mass and weight?

Answer 25

Weight is the force of gravity acting on an object's mass.

Question 26

What is Newton's Third Law of Motion?

Answer 26

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

Question 27

True or False: According to Newton's Third Law, forces act in isolation.

Answer 27

False

Question 28

Fill in the blank: If object A exerts a force on object B, then object B exerts a ______ force on object A.

Answer 28

equal and opposite

Question 29

What is the relationship between action and reaction forces?

Answer 29

They are equal in magnitude and opposite in direction.

Question 30

Multiple Choice: Which of the following is an example of Newton's Third Law? A) A rocket taking off B) A car accelerating C) A ball being thrown D) A swimmer pushing against the wall

Answer 30

D) A swimmer pushing against the wall

Question 31

What happens to the forces when two objects collide?

Answer 31

They exert equal and opposite forces on each other.

Question 32

True or False: The action and reaction forces act on the same object.

Answer 32

False

Question 33

What is meant by 'action-reaction pair'?

Answer 33

A pair of forces acting on two different objects that are equal in size and opposite in direction.

Question 34

Fill in the blank: Newton's Third Law applies to ______ interactions.

Answer 34

all

Question 35

Multiple Choice: Which scenario does NOT illustrate Newton's Third Law? A) Walking B) Jumping off a diving board C) A book resting on a table D) A balloon deflating

Answer 35

C) A book resting on a table

Question 36

What is an everyday example of Newton's Third Law of Motion?

Answer 36

When you push against a wall, the wall pushes back with an equal force.

Question 37

True or False: The reaction force occurs after the action force.

Answer 37

False

Question 38

What does the Third Law imply about the conservation of momentum?

Answer 38

It implies that momentum is conserved in interactions between objects.

Question 39

Fill in the blank: The forces of action and reaction are always exerted on ______ objects.

Answer 39

different

Question 40

Multiple Choice: Which of the following is a direct application of Newton's Third Law? A) A car's engine B) A parachute C) A rocket propulsion D) A bicycle brake

Answer 40

C) A rocket propulsion

Question 41

What is the significance of the Third Law in sports?

Answer 41

It helps explain how athletes use force to propel themselves or objects.

Question 42

True or False: Newton's Third Law is only applicable in mechanical systems.

Answer 42

False

Question 43

What would happen if action and reaction forces were not equal?

Answer 43

The motion of the objects would be unbalanced, leading to acceleration.

Question 44

Fill in the blank: The action force is the force that one object exerts on another, while the ______ force is the response from the second object.

Answer 44

reaction

Question 45

What does Newton's Third Law tell us about forces in a vacuum?

Answer 45

The law still applies; action and reaction forces occur regardless of the medium.

Question 46

Multiple Choice: Which action demonstrates Newton's Third Law? A) A person pulling a suitcase B) A ball rolling downhill C) A car reversing D) A child on a swing

Answer 46

A) A person pulling a suitcase

Question 47

What is the formula for calculating force as per Newton's laws?

Answer 47

F = ma (Force equals mass times acceleration).

Question 48

True or False: The force exerted by an object depends on its mass and acceleration.

Answer 48

True

Question 49

Fill in the blank: In a collision, momentum is transferred from one object to ______.

Answer 49

another

Question 50

What is the definition of tension force?

Answer 50

Tension force is the pulling force transmitted along a rope, string, or cable when it is pulled tight by forces acting from opposite ends.

Question 51

True or False: Tension force can only act in one direction.

Answer 51

True

Question 52

Fill in the blank: Tension force is a type of __________ force.

Answer 52

contact

Question 53

In a system where a mass is hanging from a rope, what is the relationship between the tension in the rope and the weight of the mass?

Answer 53

The tension in the rope is equal to the weight of the mass when the system is in equilibrium.

Question 54

Multiple Choice: Which of the following factors does NOT affect the tension in a rope? A) Mass of the object, B) Angle of the rope, C) Length of the rope, D) Acceleration due to gravity

Answer 54

C) Length of the rope

Question 55

What happens to the tension in a rope when the object it supports accelerates upward?

Answer 55

The tension in the rope increases above the weight of the object.

Question 56

True or False: Tension force can exist in a rope that is not moving.

Answer 56

True

Question 57

Define the term 'net force' in the context of tension.

Answer 57

Net force is the overall force acting on an object, which is the vector sum of all individual forces, including tension.

Question 58

Multiple Choice: When two objects are connected by a rope and one is pulling the other, which object experiences greater tension? A) The pulling object, B) The object being pulled, C) Both experience the same tension, D) Tension is not present.

Answer 58

C) Both experience the same tension

Question 59

What is the effect of friction on tension in a system where tension is applied?

Answer 59

Friction can reduce the effective tension experienced by the object being pulled or supported.