year 9 energy calculations

Question 1

What is the formula for calculating kinetic energy?

Answer 1

Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2

Question 2

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

Answer 2

True

Question 3

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

Answer 3

Joule

Question 4

What is the relationship between work and energy?

Answer 4

Work is the transfer of energy.

Question 5

Multiple Choice: Which of the following is a form of potential energy? a) Thermal b) Chemical c) Kinetic d) All of the above

Answer 5

b) Chemical

Question 6

What is the formula for gravitational potential energy?

Answer 6

Potential energy (PE) = mass (m) * gravity (g) * height (h)

Question 7

True or False: Energy can be created or destroyed.

Answer 7

False

Question 8

Fill in the blank: The law of conservation of energy states that energy cannot be _____ or _____ but can only be transformed.

Answer 8

created, destroyed

Question 9

What is the unit of power in the SI system?

Answer 9

Watt

Question 10

Multiple Choice: Which equation represents the relationship between power, work, and time? a) P = W/t b) P = t/W c) P = W*t d) P = W + t

Answer 10

a) P = W/t

Question 11

What is the formula for calculating the energy of an object in motion?

Answer 11

Energy = mass * velocity^2 / 2

Question 12

True or False: A higher speed results in a lower kinetic energy.

Answer 12

False

Question 13

Fill in the blank: Energy transfer can occur in the form of _____, _____, and _____ .

Answer 13

heat, work, radiation

Question 14

What does the symbol ‘g’ represent in the potential energy formula?

Answer 14

Acceleration due to gravity

Question 15

Multiple Choice: Which of the following is NOT a type of energy? a) Mechanical b) Electrical c) Imaginary d) Nuclear

Answer 15

c) Imaginary