Question 1

What is the formula for work done when force is applied at an angle?

Accepted Answer

W = F x cosθ

Answer

W = F x sinθ

Answer

W = F x v

Answer

W = F x tanθ

Question 2

What is gravitational potential energy (GPE) represented as?

Accepted Answer

E_p = mgh

Answer

E_k = 1/2 mv^2

Answer

E_p = kx

Answer

E_p = Fd

Question 3

What does the efficiency of a system describe?

Accepted Answer

The ratio of useful energy output to total energy input

Answer

The rate of energy transfer

Answer

The total energy produced

Answer

The energy lost in heat

Question 4

What unit is work done measured in?

Accepted Answer

Joules (J)

Answer

Watts (W)

Answer

Kilograms (kg)

Answer

Newtons (N)

Question 5

What is the work-energy relationship formula?

Accepted Answer

Fs = ½ mv² - ½ mu²

Answer

Fs = mv

Answer

Fs = mg

Answer

Fs = ½ mv² + ½ mu²

Question 6

What does power measure?

Accepted Answer

The rate of energy transfer

Answer

The efficiency of a system

Answer

The total energy produced

Answer

The amount of force applied

Question 7

What is the formula for calculating efficiency?

Accepted Answer

Efficiency = (Useful energy output / Total energy input) x 100%

Answer

Efficiency = Useful energy output - Total energy input

Answer

Efficiency = (Useful energy output + Total energy input) x 100%

Answer

Efficiency = (Total energy input / Useful energy output) x 100%

Question 8

What is the formula for kinetic energy (K.E.)?

Accepted Answer

E_k = ½ mv²

Answer

E_k = mgh

Answer

E_k = mv

Answer

E_k = ½ kx²

Question 9

Which force is known to cause energy loss in a system?

Accepted Answer

Friction

Answer

Momentum

Answer

Gravity

Answer

Inertia

Question 10

What is Hooke's Law?

Accepted Answer

F = kx

Answer

F = mg

Answer

F = ½ mv²

Answer

F = ma

Question 11

In Hooke's law, what does the equation F = kx represent?

Accepted Answer

The force exerted on a material is proportional to its extension

Answer

The energy stored is constant

Answer

The mass is constant

Answer

The work done is constant

Question 12

How do you calculate the work done by a constant force?

Accepted Answer

W = F x

Answer

W = F / x

Answer

W = F - x

Answer

W = F + x

Question 13

What is the unit of work?

Accepted Answer

joule

Answer

newton

Answer

pascal

Answer

watt

Question 14

How is power defined in physics?

Accepted Answer

Power is the rate of doing work

Answer

Power is force multiplied by distance

Answer

Power is energy transferred per unit time

Answer

Power is the amount of work done

Question 15

What is the gravitational potential energy formula?

Accepted Answer

E_p = mgh

Answer

E_p = 1/2 mv^2

Answer

E_p = Fd

Answer

E_p = kx^2

Question 16

What does the term 'dissipative forces' refer to?

Accepted Answer

Forces that cause energy to be transferred from a system

Answer

Forces that increase energy efficiency

Answer

Forces that create energy

Answer

Forces that only act in one direction

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