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Work and Energy_LS_1

Total questions: 56

Worksheet time: 32mins

Name
Class
Date
1.

The mass of a banana is ... g

a)

100

b)

150

c)

200

2.

What unit of measurement is used for mass ?

a)

Liters

b)

Kilograms

c)

Meters

3.

The tiny particles that everything is made of are called _____

a)

mass

b)

matter

c)

stuff

d)

atoms

4.

Mass can be explained as _____

a)

a) Amount of space

b)

b) Amount of time

c)

c) Amount of weight

d)

d) Amount of matter

5.

How much work is done when a body of mass m is raised to a height h above the ground?

a)

Work done = potential energy acquired by the body = mgh

b)

50 kJ

c)

Its potential energy increases and kinetic energy decreases during the falls

d)

It moves for some time, then rests, then moves again

6.

State the SI unit of work.

a)

Newtons

b)

Watts

c)

Joules

d)

Meters

7.

Is work a scalar or a vector quantity?

a)

Work is a scalar quantity as it requires only magnitude.

b)

Work is a vector quantity as it requires only direction and magnitude.

8.

What is/are the unit/s of work?

a)

Newton

b)

dyn

c)

Newton meter

d)

Joule

9.

Define 1 joule of work.

a)

F*d2

b)

F*d

c)

F2*d

d)

(1/2)F*d

e)

W= F * S

10.

Which of the following are units of power (though perhaps not standard)?

Include all that apply.

a)

Watt

b)

Joule

c)

Joule / second

d)

hp

11.

1 Joule is the amount of work done when a force of one Newton displaces a body one meter in the direction of the force applied.

a)

True

b)

False

12.

The ability to do work is called __________

a)

Power

b)

Energy

c)

Force

d)

Friction

13.

A push or a pull acting on an object.

a)

Force

b)

Energy

c)

Work

d)

Wind

14.
Something that changes the speed, direction, or shape of another object by pushing or pulling
a)
force
b)
motion
c)
science
d)
sponge bob
15.
Forces change the speed, direction or shape by ____________________-
a)
pushing or pulling
b)
shoving
c)
rolling
d)
jumping
16.

When a motion is produced in the body, work is said to be done on the body as _______ is applied on it.

a)
force
b)
motion
c)
science
d)
sponge bob
17.

Energy is a _____ quantity as it has only magnitude

a)

scalar

b)

vector

18.

What is the unit for work ?

a)

Newtons

b)

Watts

c)

Joules

d)

Meters

19.

What is the unit for energy?

a)

Newtons

b)

Watts

c)

Joules

d)

Meters

20.

What is the work done against gravity when a body is moved horizontally along a frictionless surface? What is the first statement of the audio clip?

a)

The work done against the gravity when a body is move horizontally along a frictionless surface is zero

b)

as the

force of gravity acts perpendicular to the direction of motion.

21.

What is the work done against gravity when a body is moved horizontally along a frictionless surface? What is the secondstatement of the audio clip?

a)

The work done against the gravity when a body is move horizontally along a frictionless surface is zero

b)

as the

force of gravity acts perpendicular to the direction of motion.

22.

By how much will the kinetic energy of a body increase if its speed is doubled? What is the first statement of the audio clip?

a)

The kinetic energy is directly proportional to the square of the speed of the body.

b)

Therefore, when the kinetic energy of the body is increased

c)

the kinetic energy will become four times the actual value.

23.

By how much will the kinetic energy of a body increase if its speed is doubled? What is the second statement of the audio clip?

a)

The kinetic energy is directly proportional to the square of the speed of the body.

b)

Therefore, when the kinetic energy of the body is increased

c)

the kinetic energy will become four times the actual value.

24.

By how much will the kinetic energy of a body increase if its speed is doubled? What is the third statement of the audio clip?

a)

The kinetic energy is directly proportional to the square of the speed of the body.

b)

Therefore, when the kinetic energy of the body is increased

c)

the kinetic energy will become four times the actual value.

25.

What is the equation for kinetic energy?

a)

Mass ×Speed22\frac{Mass\ \times Speed^2}{2}  

b)

Mass ×Speed2\frac{Mass\ \times Speed}{2}  

c)

Mass ×Speed2Mass\ \times Speed^2  

26.

If the speed of a body is halved, what will be the change in its kinetic energy?

a)

1/4

b)

1/2

c)

2x

d)

4x

27.

Kinetic energy is (a)   proportional to the mass of an object.

28.

Kinetic energy is (a)   proportional to the square of velocity of the body, v2 ; of an object.

29.

What is the kinetic energy (KE) of a 0.06kg tennis ball traveling at a speed of 150m/s? [Formula for K.E. is 1/2 mv^2]

(a)  

30.

State whether the following objects possess kinetic energy, potential energy, or both:

a) a man climbing a hill

a)

Both kinetic and potential energy

b)

Only kinetic energy

c)

Only potential energy

d)

Only potential energy

31.

State whether the following objects possess kinetic energy, potential energy, or both:

b) a flying aeroplane

a)

Both kinetic and potential energy

b)

Only kinetic energy

c)

Only potential energy

d)

Only potential energy

32.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

33.

Energy of MOTION is known as:

a)

Kinetic Energy

b)

Potential Energy

c)

Gravitational Potential Energy

d)

Elastic Potential Energy

34.

What is the correct formula for PE?

a)

PE = 1/2mv2

b)

PE = 1/2kx2

c)

PE = mgh

d)

ke = pe

35.

What is the correct formula for KE?

a)

PE = 1/2mv2

b)

PE = 1/2kx2

c)

PE = mgh

d)

ke = pe

36.

what 2 factors does kinetic energy depend on?

a)

- Mass of the object (m)

- Speed the object is moving (v)

b)

- Mass of the object (m)

- Weight of the object (W)

c)

- Speed of the object (v)

- Weight of the object (W)

d)

- Weight (W)

- velocity (V->)

37.

What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?

a)

2J

b)

3J

c)

4J

d)

1J

38.

potential energy is a _______ quantity?

a)

scalar

b)

vector

39.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

40.

What is the value of the Earth's acceleration due to gravity (g)?

a)

9.8 m/s2

b)

100 m/s2

c)

25 m/s2

d)

3.14 m/s2

41.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s2

a)

9.8 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s2

42.

An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump?

Let g = 9.8N/kg

a)

24 m

b)

161,540 m

c)

2.5 m

d)

201 m

43.
Explain what happens to the potential energy of a rock as it falls off the side of a cliff.
a)
The kinetic energy decreases as the potential energy increases.
b)
The kinetic energy decreases as the potential energy decreases.
c)
The potential energy decreases as the kinetic energy increases.
d)
The potential energy decreases as the kinetic energy decreases. 
44.

A load of 100 kg is pulled up by 5 m. Calculate the work done.

a)

4900J

b)

4800J

c)

4700J

45.

The potential energy of a body of mass 1 kg kept at a height of 1m is 1J.

(PE = mgh)

a)

True

b)

False

46.

What happens to the potential energy of a body when its height is doubled?

a)

Potential energy is directly proportional to the height. Therefore, when the height is doubled, potential energy also gets doubled.

b)

Potential energy is inversely proportional to the height. Therefore, when the height is doubled, potential energy also gets doubled.

c)

Potential energy is directly proportional to the height. Therefore, when the height is doubled, potential energy also gets halved .

47.

Which of these has the most potential energy?

a)
b)
c)
d)
48.

Which passenger has the most potential energy?

a)

A

b)

B

c)

C

d)

D

49.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

50.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
c)
Both potential and kinetic energy
d)
none of the above
51.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
52.

Which is the best example of something that has kinetic energy?

a)

a car parked on a steep hill

b)

a tennis ball rolling across the court

c)

a picture hanging on a wall

d)

a piece of wood before it is burned.

53.

What would have the greatest kinetic energy?

a)

A person running down a hill.

b)

A bowling ball rolling down a hill

c)

A car driving down a hill

54.

What would have the greatest potential energy?

a)

A person running down a hill.

b)

A bowling ball rolling down a hill

c)

A car driving down a hill

d)

water stored in the reservoir of a dam

55.

Which is the best example of something that has Potential energy?

a)

a car parked on a steep hill

b)

a tennis ball rolling across the court

c)

a picture hanging on a wall

d)

a piece of wood before it is burned.

e)

a compressed spring

56.

a stretched rubber band.

a)

Potential energy

b)

Kinetic energy

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