We can calculate work done using this equation: W = F × d . Write this equation in words.

The formula for calculating the work done is W = F × d . Work done is defined as the product of force and displacement. Work done can be negative positive or even zero based on the displacement of the body. The SI unit of work done is joule J .

We can calculate work done using this equation: W = F × d . Copy and complete the table to show the units of each quantity in the equation. Quantity Unit W F d

The formula for calculating the work done is W = F × d . Work done is defined as the product of force and displacement. Work done can be negative positive or even zero based on the displacement of the body. The SI unit of work done is joule J . All the units of the terms in the equation is given below in the equation. Quantity Unit W joule J F newton N d metre m

We can calculate work done using this equation: W = F × d . We can also write W = ∆ E . What does ∆ E represent?

The formula for calculating the work done is W = F × d . Work done is defined as the product of force and displacement. Work done can be negative positive or even zero based on the displacement of the body. The SI unit of work done is joule J . Work is defined as the transfer of energy. When energy is transferred to an item, we can say that work is done on that thing. When one thing transfers energy to another, the first object does work on the latter. The application of a force across a distance is known as work. So the E in the equation is energy and ∆ E is the change in energy which is equal to work done and is defined by work-energy theorem.

We can calculate power using this equation: P = W t . Write this equation in words.

Power can be defined as the work done in unit time. The SI unit of power is watt W which is also equal to joules per second J s - 1 . The quantity of energy transferred or converted per unit time is also known as power. The equation for power is given by : P = W t .

EASY

Upper Secondary: IGCSE

IMPORTANT

Earn 100

Write an equation showing how work done and energy transferred are related.

Important Questions on Work and Power

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 4

We can calculate work done using this equation: $W = F \times d$ .

Write this equation in words.

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 4

We can calculate work done using this equation: $W = F \times d$ .

Copy and complete the table to show the units of each quantity in the equation.

Quantity	Unit
$W$
$F$
$d$

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 4

We can calculate work done using this equation: $W = F \times d$ .

We can also write $W = ∆ E$ . What does $∆ E$ represent?

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 5

We can calculate power using this equation: $P = \frac{W}{t}$ .

Write this equation in words.

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 5

We can calculate power using this equation: $P = \frac{W}{t}$ .

Copy and complete the table to show the units of each quantity in the equation.

Quantity	Unit
$P$
$W$
$t$

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 6

Omar and Ahmed are lifting weights in the gym. Each lifts a weight of

200 N

. Omar lifts the weight to a height of

2.0 m

, when Ahmed lifts it to a height of

2.1 m

. Who does more works in lifting the weight? Explain how you know.

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 7

Millie and Lily are identical twins who enjoy swimming. Their arms and legs provide the force needed to move them through the water. Millie can swim $25 m$ in $50 s$ . Lily can swim $100 m$ in $250 s$ .

Calculate the swimming speed of each twin.

EASY

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 8 - Work and Power>End-of-chapter questions>Q 7

Which twin has the greater power when swimming? Explain how you can tell.

Write an equation showing how work done and energy transferred are related.

Important Questions on Work and Power

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