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base units

Total questions: 28

Worksheet time: 22mins

Name
Class
Date
1.

Is this an SI base unit: second (s)?

a)

Yes

b)

No

2.

Is this an SI base unit: kilometre (km)?

a)

Yes

b)

No

3.
The SI unit for measuring mass is the
 __?__.
a)
meter (m)
b)
liter (L)
c)
cubic meter (m3)
d)
kilogram (kg)
4.
What SI unit is used to measure electric current?
a)
seconds
b)
amperes
c)
Kelvin
d)
mole
5.
What is base quantities ?
a)
the branch of science concerned with the nature and properties of matter and energy
b)
the branch of science that deals with the identification of the substances of which matter is composed
c)
physical quantities that cannot be defined in terms of other physical quantities
6.
What is derived quantities ?
a)
a tendency to do nothing or to remain unchanged.
b)
combination of two or more base quantities
c)
the quantity of motion of a moving body, measured as a product of its mass and velocity.
7.
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
8.

Write the vector from B to C...

a)

r + s

b)

-r + s

c)

s + r

d)

-s - r

9.

Write the vector from C to B...

a)

r + s

b)

s - r

c)

s + r

d)

r - s

10.

Write the vector from C to A...

a)

r

b)

-r

c)

s

d)

-s

11.

Write the vector from B to A...

a)

r

b)

-r

c)

s

d)

-s

12.

Write the vector from A to B...

a)

r

b)

-r

c)

s

d)

-s

13.
What is the y component of the vector given in the diagram?
a)
77N
b)
92N
c)
120N
d)
60N
14.
What is the x component of the vector given in the diagram?
a)
77N
b)
92N
c)
120N
d)
60N
15.
How do you combine vectors if they are at a right angle to each other, and you know two sides?
a)
Multiply
b)
Divide
c)
Pythagorean Theorem
d)
Use trigonometry
16.
How do you combine vectors if they are in opposite directions?
a)
Add
b)
Subtract
c)
Pythagorean Theorem
d)
Use trigonometry
17.
How do you combine vectors if they are in the same direction?
a)
Add
b)
Subtract
c)
Pythagorean Theorem
d)
Use Trigonometry
18.

Acceleration can be... (select all that apply)

a)

speeding up

b)

slowing down

c)

staying at constant speed

d)

changing directions

19.

Velocity is different from speed because...

a)

Velocity is distance/time. Speed is displacement/time.

b)

Velocity is speed in a certain direction and can be positive or negative.

c)

Speed is velocity in a certain direction. Both can only be positive.

d)

Velocity is how much speed changes over time.

20.

The slope of this position vs time graph is?

a)

Constant

b)

Increasing

c)

Decreasing

d)

0

21.

The slope of this position vs time graph is...

a)

Constant

b)

Increasing

c)

Decreasing

d)

0

22.

A horse accelerates from a velocity of 0m/s to 20 m/s in 3 seconds. What is the acceleration of the horse?

a)

60 m/s2

b)

6.67 m/s2

c)

0.15 m/s2

d)

30 m/s2

23.

A train decelerates from a velocity of 90 m/s to 80m/s in over 10 seconds. What is the train's acceleration?

a)

-1 m/s2

b)

1 m/s2

c)

10 m/s2

d)

-10 m/s2

24.

Select the description of motion from A - B.

a)

Slowing down away from the origin

b)

Speeding up away from the origin

c)

Constant velocity away from the origin

d)

Constant velocity towards the origin

25.

True or False: this graph shows several segments ALL with constant velocity.

a)

True

b)

False

26.
Which runner won the race?
a)
A
b)
B
c)
C
27.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
28.

What is this graph showing?

a)

Constant speed

b)

Gradually speeding up

c)

Gradually slowing down

d)

At rest

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