Physics (Y8) End of Years Revision

Question 1

What is the definition of a force?

Answer 1

A force is an interaction that causes an object to change its velocity, which includes starting, stopping, or changing direction.

Question 2

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

Answer 2

False

Question 3

Fill in the blank: The unit of force in the International System of Units (SI) is the _____.

Answer 3

Newton

Question 4

Which of the following is NOT a type of force? A) Gravitational B) Electromagnetic C) Frictional D) Thermal

Answer 4

D) Thermal

Question 5

Describe one way in which forces can be classified.

Answer 5

Forces can be classified as contact forces or non-contact forces.

Question 6

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

Answer 6

A force can increase or decrease the speed of an object.

Question 7

True or False: Forces only affect the direction of an object’s movement.

Answer 7

False: Forces can affect speed, direction, and shape.

Question 8

Fill in the blank: When a force acts on an object, it can change its __________.

Answer 8

shape

Question 9

Which of the following is NOT an effect of forces? A) Change in speed B) Change in color C) Change in direction

Answer 9

B) Change in color

Question 10

What happens to the direction of an object when a force is applied at an angle?

Answer 10

The direction of the object will change according to the angle of the applied force.

Question 11

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

Answer 11

Newton

Question 12

True or False: A newtonmeter is a device used to measure force.

Answer 12

True

Question 13

Fill in the blank: One newton is defined as the force required to accelerate a mass of ___ kilograms at a rate of 1 meter per second squared.

Answer 13

1

Question 14

What is a newtonmeter also known as?

Answer 14

Torque

Question 15

Multiple Choice: Which of the following is a correct expression of force using newtonmeters? A) 1 N = 1 kg·m/s² B) 1 N = 1 kg·m²/s² C) 1 N = 1 m/s²

Answer 15

A) 1 N = 1 kg·m/s²

Question 16

What is the SI unit of force?

Answer 16

Newton (N)

Question 17

True or False: 1 Newton is equivalent to 1 kg·m/s².

Answer 17

True

Question 18

Fill in the blank: The unit of force is named after Sir Isaac _____.

Answer 18

Newton

Question 19

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

Answer 19

B) Newton

Question 20

What is the relationship between mass, acceleration, and force as described by Newton’s second law?

Answer 20

Force equals mass times acceleration (F = m·a).

Question 21

What is the symbol for Force?

Answer 21

F

Question 22

True or False: The symbol ‘F’ represents force in physics.

Answer 22

True

Question 23

Fill in the blank: In physics, force is denoted by the letter ___.

Answer 23

F

Question 24

Multiple Choice: Which of the following is the correct symbol for Force? A) F B) F1 C) Force D) F2

Answer 24

A) F

Question 25

Short Answer: What does the symbol 'F' stand for in the context of physics?

Answer 25

Force

Question 26

What are the two main categories of forces?

Answer 26

Contact forces and non-contact forces.

Question 27

True or False: Gravitational force is a type of contact force.

Answer 27

False.

Question 28

Fill in the blank: Forces that require physical contact between objects are called __________.

Answer 28

Contact forces.

Question 29

Name one example of a non-contact force.

Answer 29

Gravitational force, magnetic force, or electrostatic force.

Question 30

Which type of force includes friction and tension?

Answer 30

Contact forces.

Question 31

What are the four fundamental forces of nature?

Answer 31

Gravitational force, electromagnetic force, strong nuclear force, and weak nuclear force.

Question 32

True or False: The gravitational force is the strongest of the four fundamental forces.

Answer 32

False

Question 33

Fill in the blank: The force that holds atomic nuclei together is called the __________ force.

Answer 33

strong nuclear

Question 34

Which force is responsible for the attraction between charged particles?

Answer 34

Electromagnetic force

Question 35

Multiple Choice: Which of the following forces is responsible for radioactive decay? A) Gravitational force B) Electromagnetic force C) Strong nuclear force D) Weak nuclear force

Answer 35

D) Weak nuclear force

Question 36

What are contact forces?

Answer 36

Contact forces are forces that occur when two objects are physically touching each other.

Question 37

Which of the following is a non-contact force? (a) Friction (b) Gravity (c) Tension

Answer 37

b) Gravity

Question 38

True or False: Air resistance is a contact force.

Answer 38

False

Question 39

Fill in the blank: __________ is an example of a contact force that opposes the motion of an object.

Answer 39

Friction

Question 40

Name one example of a non-contact force.

Answer 40

Magnetic force, gravitational force, or electrostatic force.

Question 41

What is a free body diagram?

Answer 41

A free body diagram is a graphical representation used to visualize the forces acting on an object.

Question 42

True or False: A free body diagram includes all objects in a system.

Answer 42

False

Question 43

Fill in the blank: In a free body diagram, forces are represented as ________ acting at the point of interest.

Answer 43

vectors

Question 44

What purpose does a free body diagram serve in physics?

Answer 44

It helps to analyze the forces acting on an object to solve problems related to motion and equilibrium.

Question 45

Which of the following is NOT typically included in a free body diagram? A) Forces B) Object B) Surrounding environment

Answer 45

C) Surrounding environment

Question 46

What is the first step in drawing a free-body diagram?

Answer 46

Identify the object of interest.

Question 47

True or False: In a free-body diagram, all forces acting on the object must be represented.

Answer 47

True

Question 48

Fill in the blank: Forces in a free-body diagram are represented as _____ originating from the object's center of mass.

Answer 48

arrows

Question 49

What should be included when representing forces in a free-body diagram?

Answer 49

Magnitude, direction, and point of application.

Question 50

Multiple Choice: Which of the following is NOT a rule for drawing free-body diagrams? A) Include only external forces B) Include all internal forces C) Use arrows to represent forces D) Label each force clearly

Answer 50

B) Include all internal forces

Question 51

What is the definition of resultant force?

Answer 51

The resultant force is the single force that represents the vector sum of all individual forces acting on an object.

Question 52

True or False: The resultant force can be zero.

Answer 52

True

Question 53

Fill in the blank: The resultant force determines the object's _____.

Answer 53

acceleration

Question 54

Which of the following represents the resultant force when two forces of 5 N and 3 N act in the same direction? A) 2 N B) 8 N C) 15 N

Answer 54

B) 8 N

Question 55

What happens to an object when the resultant force acting on it is greater than zero?

Answer 55

The object will accelerate in the direction of the resultant force.

Question 56

What is the definition of resultant force?

Answer 56

The resultant force is the single force that represents the combined effect of all individual forces acting on an object.

Question 57

True or False: To calculate the resultant force, you simply add all forces acting in the same direction and subtract those acting in the opposite direction.

Answer 57

True

Question 58

Fill in the blank: The formula to calculate the resultant force (R) when two forces (F1 and F2) are acting in the same line is R = _____ .

Answer 58

F1 + F2

Question 59

If a force of 10 N is acting to the right and a force of 4 N is acting to the left, what is the resultant force?

Answer 59

6 N to the right

Question 60

What is the first step in calculating the resultant force when forces are acting at angles?

Answer 60

Resolve each force into its horizontal and vertical components.

Question 61

What are balanced forces?

Answer 61

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

Question 62

True or False: Unbalanced forces result in a change in an object's motion.

Answer 62

True

Question 63

Fill in the blank: When the net force on an object is ______, the forces are balanced.

Answer 63

zero

Question 64

What happens to an object when unbalanced forces act on it?

Answer 64

The object will accelerate in the direction of the net force.

Question 65

Multiple Choice: Which of the following scenarios illustrates unbalanced forces? A) A book resting on a table B) A car speeding up at a traffic light C) A person holding a heavy object still

Answer 65

B) A car speeding up at a traffic light