Free Printable 9.03: Work and Energy Revision

1.

What is the formula for work?

a)

Force = work × distance

b)

Distance = force × work

c)

Work = force × distance

d)

Work = force × mass

2.

What is the S.I unit of work?

a)

N.m²

b)

(Kg.m²) / s²

c)

J/m

d)

J

3.

In which scenario is work = 0 J ?

a)

Pushing a stationary wall

b)

Pulling a trolley car

c)

Pushing a book across the table

d)

Dropping a set of keys from a height, h.

4.

In which of the following situations do your arms do work on books?

a)

holding a heavy stack of books while standing

b)

carrying a heavy stack of books

c)

dropping a stack of books onto a table

d)

picking up a pile of books from the floor

5.

If W=Fd

Then how much work is done if it takes 20N to move a box 10 meters

a)

0 J

b)

2 J

c)

20 J

d)

200 J

6.

What is energy?

a)

something that picks up things, like a magnet.

b)

Motion of an object

c)

ability to do work

d)

magic rays of sunshine that come down when you're feeling blue.

7.

What kind of energy is in a rock at the edge of a cliff?

a)

Gravitational potential energy

b)

Kinetic energy

8.

Water stored in a dam possesses

a)

(a) no energy

b)

(b) electrical energy

c)

(c) kinetic energy

d)

(d) potential energy

9.

What is the principle of conservation of energy?

a)

energy cannot be created or destroyed but can only be converted from one form to another

b)

energy can be created and destroyed as it converts from one form to another

c)

energy cannot be converted from one form to another

10.

What is the energy conversion when you put batteries in a flashlight to make it turn on?

a)

chemical to light

b)

light to kinetic

c)

chemical to heat

d)

nuclear to light

11.

What is the energy conversion when you feel the warmth of the sun?

a)

nuclear to heat

b)

nuclear to kinetic

c)

potential to nuclear

d)

light to nuclear

12.

What is the energy conversion when photosynthesis takes place as the sun makes a plant grow?

a)

electrical to chemical

b)

potential to nuclear

c)

chemical to potential

d)

light to chemical

13.

What is the definition of potential energy?

a)

The energy an object has due to its position in a force field

b)

The energy an object has due to its motion

c)

The energy an object has due to its chemical composition

d)

The energy an object has due to its mass

14.

What is the formula for the gravitational potential energy $\left(E_g\right)$ of an object of mass $\left(m\right)$ held at a height $\left(h\right)$ above the ground?

a)

$E_g\ =\ mgh$

b)

$E_g=\frac{1}{2}mgh^2$

c)

$E_g\ =\ 2mgh^2$

d)

$E_g=\ \frac{mg}{h}$

15.

A body is falling from a height h. After it has fallen a height $\frac{h}{2}$ , it will possess

a)

(a) only potential energy

b)

(b) only kinetic energy

c)

(c) half potential and half kinetic energy

d)

(d) more kinetic and less potential energy

16.

How far above the surface of the Earth must a 4kg mass be raised so that its potential energy is increased by 4,000J?

a)

102 m

b)

260 m

c)

57.8 m

d)

98 m

17.

Which is the correct formula for the kinetic energy $\left(E_k\right)$ of an object of mass, $m$ , moving with a velocity, $v$ ?

a)

$E_k=mv^2$

b)

$E_k\ =\ \frac{1}{2}mv^2$

c)

$E_k\ =\ m^2v$

d)

$E_k\ =\ mv$

18.

Which has a greater impact on the kinetic energy of an object?

a)

mass of the object

b)

velocity of the object

19.

Where would this tossed baseball have the least amount of kinetic energy?

a)

point W

b)

point X

c)

point y

d)

point z

20.

Where would this tossed baseball have the greatest amount of kinetic energy?

a)

point W

b)

point X

c)

point y

d)

point z

21.

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

a)

1457 Joules

b)

22,584 Joules

c)

15 Joules

d)

45,167Joules

22.

A stone of mass 3 kg is dropped from a height of 60 m. Find its kinetic energy and speed just before it hits the ground.

a)

$E_k\ =\ 1,764\ J\$ , $v\ =\ 34.3\ ms^{-1}$

b)

$E_k\ =\ 2,563\ J$ , $v\ =\ 95.6\ ms^{-1}$

c)

$E_k\ =\ 485\ J$ , $v\ =\ 21.8\ ms^{-1}$

d)

$E_k\ =\ 3,214\ J$ , $v\ =\ 103.3\ ms^{-1}$

9.03: Work and Energy Revision

Total questions: 22

Worksheet time: 2hrs 50mins

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