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REVISION FOR PHYSICS ELECTIVE MAR 2022

Total questions: 60

Worksheet time: 10hrs 0mins

Name
Class
Date
1.

How many significant figures? 100,000

a)

1

b)

2

c)

3

d)

4

e)

5

2.

How many significant figures? 2.006

a)

1

b)

2

c)

3

d)

4

e)

5

3.

How many significant figures? 3.50

a)

1

b)

2

c)

3

d)

4

e)

5

4.

How many significant figures? 0.00050

a)

1

b)

2

c)

3

d)

4

e)

5

5.

Write the following numbers (and round if necessary) to 3 significant figures: 1,234,000,000

a)

1.234 x 109

b)

1.23 x 108

c)

1.23 x 1010

d)

1.23 x 109

6.

0.0095678212

a)

9.57 x 10-2

b)

9.57 x 100

c)

9.57 x 10-3

d)

9.57 x 104

7.

Write the following numbers (and round if necessary) to 3 significant figures. 0.0000006563

a)

6.56 x 10-6

b)

6.56 x 10-7

c)

6.56 x 10-8

d)

6.56 x 10-9

8.

Find the answers to the following questions (and round if necessary) to 3 significant figures:


0.0251 + 0.1155

a)

1.41 x 10-1

b)

1.41 x 100

c)

1.41 x 101

d)

1.41 x 102

9.
How would you write 0.0005 in scientific notation?
a)
50 x 105
b)
5 x 10-4
c)
5 x 103
d)
0.5 x 103
10.
Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.
a)
1.0 m2
b)
1.1 m2
c)
1.0947 m2
d)
1.09 m2
11.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
12.
Solve & Round to Correct Sig Figs.
4.5 x 2.34 = 
a)
11
b)
10.52
c)
10.5
d)
10
13.
1345.567 / 23.56 = ? (Use significant figures!)
a)
57.11
b)
58.11
c)
56.75
d)
83.49
14.

How many significant figures does 1.90 have?

a)

1

b)

2

c)

3

d)

4

15.

The number of significant figures is: 10.0

a)

1

b)

2

c)

3

d)

4

16.

The expanded form of 3.4 x 104 is

a)

0.00034

b)

340

c)

3400

d)

34000

17.

Calculate 12.34 × 1.23 × 0.12

Round your answer to the correct number of significant figures.

a)

1.821384

b)

1.8

c)

1.8 x 101

d)

2.0

18.

0.006 has ________ significant figures (sigfigs)

a)

4

b)

3

c)

2

d)

1

19.
Which of the following measurements contains two significant figures?
a)
0.00400 L
b)
0.00404 L
c)
0.00044 L
d)
0.00440 L
20.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
21.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
22.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
23.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
24.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
25.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
26.
A scalar is a magnitude _____.
a)
With direction.
b)
Without direction.
27.
Wind blowing at 20 mph.Vector or scalar?
a)
Scalar
b)
Vector
28.
30 m/sec, East. Scalar or Vector
a)
Scalar
b)
Vector
c)
Neither
29.
Distance
a)
Vector
b)
Scalar
30.
Displacement
a)
Vector
b)
Scalar
31.
Which statement describes a vector?
a)
It has magnitude but no direction
b)
It has direction but no magnitude
c)
It has both direction and magnitude
d)
It has constant magnitude but no
 direction
32.
Which of these is not a vector quantity? 
a)
displacement 
b)
time
c)
velocity 
d)
acceleration
33.
Which of the following quantities are vectors?
a)
speed, velocity, acceleration
b)
velocity, acceleration, force
c)
force, acceleration, mass
d)
length, mass, time
34.

A man pushes a 50kg box at a constant velocity. He applies a force of 200N to the left.


Calculate Fg

a)

50kg

b)

200N

c)

500N

d)

20kg

35.

A man pushes a 50kg box at a constant velocity. He applies a force of 200N to the left.


What is Fa?

a)

50kg

b)

200N right

c)

500N

d)

200N left

36.

A man pushes a 50kg box at a constant velocity. He applies a force of 200N to the left.


Is this balanced or unbalanced?

a)

Balanced

b)

Unbalanced

c)

Not enough information

37.

Find the weight of a 20g object

a)

200N

b)

20g

c)

0.2N

d)

0.02kg

38.

What is the weight of a 456g object?

a)

456g

b)

0.456kg

c)

4.56N

d)

456N

39.

You have a ball with a weight of 76N. What is the mass of the ball?

a)

76N

b)

76kg

c)

7.6kg

d)

7.6N

40.

What statement is true?

a)

Mass never changes. Weight does.

b)

Weight never changes. Mass does.

c)

Both mass and weight change because they are affected by gravity.

d)

Neither mass nor weight change. They are always the same.

41.

Find the weight of a 5kg rock on Mercury with a gravitational pull of 3.59m/s/s.

a)

5kg

b)

17.95N

c)

1.39N

d)

0.718N

42.

Weight is _________.

a)

the quantity of matter in an object.

b)

the measure of an object's inertia.

c)

the force exerted by gravity on an object's mass.

d)

equal to the mass of an object.

43.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
44.
The scientific unit of weight is
a)
Kg
b)
N
c)
pounds
d)
Kgm/s
45.
If an object has more mass, then it will
a)
weigh more.
b)
weigh less.
c)
weigh the same as an object with less mass.
d)
always have more volume than an object with less mass.
46.
The scientific unit for mass is
a)
Kg
b)
N
c)
pounds
d)
ounces
47.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
48.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
49.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
50.
What is the moment produced by the 15 N?
a)
15 Nm (clockwise)
b)
150 Nm (anti - clockwise)
c)
1.5 Nm (anti - clockwise)
d)
0.15 Nm (clockwise)
51.
A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?
a)
The larger person moving further away from the center.
b)
Moving the smaller person closer to the center.
c)
Moving the smaller person further from the center.
d)
Making the larger person do nothing.
52.

Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?

a)

0.42 m

b)

2.4 m

c)

4.8 m

d)

4.2 m

53.

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

a)

450 N

b)

350 N

c)

4.5 N

d)

200 N

54.

How do you measure gradient?

a)

Gradient = rise / run

b)

Gradient = vertical change in x / horizontal change in y

c)

Gradient = vertical change in y / horizontal change in x

d)

Gradient = run / rise

55.

What is the definition of

Gradient of a Line?

a)

It is the measure of degrees of a line.

b)

It is the measure of length of a line.

c)

It is the measure of steepness of a line.

d)

It is the measure of strength of a line.

56.

What slope is represented here

a)

negative

b)

zero

c)

undefined

d)

positive

57.

What is the gradient of this line?

a)

2

b)

-2

c)

1/2

d)

-1/2

58.

What is the gradient of the line TU?

a)

5

b)

-5

c)

0

d)

undefined

59.

What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time?

a)

The body will come back to its original position

b)

The body will oppose the stress

c)

The body cannot return to its original position

d)

The body becomes hot

60.

What is the gradient of this line?

a)

4

b)

4/5

c)

-2

d)

-1/2

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