Physics

Question 1

What is the formula for kinetic energy?

Answer 1

The formula for kinetic energy is KE = 1/2 mv², where m is mass and v is velocity.

Question 2

True or False: Gravitational potential energy depends on the height of an object above a reference point.

Answer 2

True

Question 3

Fill in the blank: The formula for gravitational potential energy is…

Answer 3

Mass x height x gravitational field strength

Question 4

What does ‘m’ represent in the gravitational potential energy formula?

Answer 4

‘m’ represents the mass of the object.

Question 5

Which type of energy is associated with the motion of an object?

Answer 5

Kinetic energy

Question 6

Multiple Choice: Which of the following is NOT a type of energy store? A) Kinetic B) Thermal C) Magnetic D) Time

Answer 6

D) Time

Question 7

What factors affect gravitational potential energy?

Answer 7

Mass, height, and the acceleration due to gravity.

Question 8

True or False: Energy can be created or destroyed.

Answer 8

False

Question 9

What is the unit of measurement for energy?

Answer 9

Joule (J)

Question 10

Short Answer: Describe what energy transfer means.

Answer 10

Energy transfer refers to the movement of energy from one place or object to another.

Question 11

What is the primary function of a power station?

Answer 11

To generate electricity.

Question 12

True or False: A hydroelectric power station uses water to generate electricity.

Answer 12

True.

Question 13

Fill in the blank: A ______ power station converts thermal energy from fossil fuels into electricity.

Answer 13

Geothermal

Question 14

What type of power station uses nuclear reactions to generate heat?

Answer 14

Nuclear power station.

Question 15

Multiple Choice: Which of the following is NOT a type of power station? A) Wind B) Solar C) Mechanical D) Geothermal

Answer 15

C) Mechanical.

Question 16

What is the main renewable energy source used in wind power stations?

Answer 16

Wind.

Question 17

True or False: Solar power stations can only operate during the day.

Answer 17

True.

Question 18

What is the process called in which solar panels convert sunlight into electricity?

Answer 18

Photovoltaic effect.

Question 19

Fill in the blank: A ______ power station harnesses the heat from the Earth’s interior.

Answer 19

geothermal

Question 20

What is the role of a transformer in a power station?

Answer 20

To increase or decrease voltage levels for transmission.

Question 21

What is a scalar?

Answer 21

Something that only has a size

Question 22

What is a vector?

Answer 22

Something that has a size and a direction

Question 23

What is an example of a scalar?

Answer 23

Speed, mass, energy, distance and time

Question 24

What is an example of a vector?

Answer 24

Velocity, weight, force, displacement, acceleration and momentum

Question 25

What is acceleration?

Answer 25

How fast something gets up to it’s top speed

Question 26

What is deceleration?

Answer 26

How quickly something comes to a stop

Question 27

What is the equation for acceleration?

Answer 27

Acceleration = final velocity - initial velocity divided by time

Question 28

How do you find the acceleration on a V/T graph?

Answer 28

The gradient of the line is the acceleration

Question 29

What does the area under the line show on a V/T graph?

Answer 29

Distance travelled

Question 30

A car accelerates at 2m/s squared and covers 30m. If it started at rest, what was its final velocity?

Answer 30

V squared - U squared = 2 times x times a V squared - 0 squared = 2 x 2 x 30 =120 V squared =120 V = the square root of 120 = 10.95m/s

Question 31

What is the formula for calculating speed?

Answer 31

Speed = Distance / Time

Question 32

True or False: Acceleration is the rate of change of velocity.

Answer 32

True

Question 33

Fill in the blank: The unit of acceleration in the SI system is __________.

Answer 33

meters per second squared (m/s²)

Question 34

What is the acceleration of an object that changes its velocity from 10 m/s to 20 m/s in 5 seconds?

Answer 34

2 m/s²

Question 35

Multiple choice: Which of the following is NOT a type of motion? A) Linear B) Circular C) Oscillatory D) Static

Answer 35

D) Static

Question 36

What does a negative acceleration indicate?

Answer 36

The object is slowing down.

Question 37

True or False: An object in motion will always remain in motion unless acted upon by an external force.

Answer 37

True

Question 38

Fill in the blank: The concept of inertia is defined as the tendency of an object to __________.

Answer 38

resist changes in its state of motion

Question 39

What is the difference between speed and velocity?

Answer 39

Speed is a scalar quantity, while velocity is a vector quantity that includes direction.

Question 40

Multiple choice: If a car is moving in a circular path at a constant speed, what type of acceleration is it experiencing? A) Linear B) Centripetal C) Tangential D) None

Answer 40

B) Centripetal