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WorksheetsSci9 09-09 Chapter 9 Test Review
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
You push a large rock with a force of 200N and it doesn't move. How much work was done?
a)
200N
b)
200J
c)
0 J
d)
Why would anyone push a large rock?
2.
What are the units of Work?
a)
J
b)
Nm
c)
kg m2/s2
d)
All of these
3.
Which requires the most work?
a)
Lifting a glass
b)
Pushing a car 10m
c)
Pushing a truck that doesn't move
d)
THrowing a bowling ball down the lane.
4.
What are the units of power?
a)
watts
b)
horsepower
c)
J/s
d)
All of the above
5.
What is the mechanical advantage of a ramp that is 10m long and 2m high?
a)
2
b)
5
c)
10
d)
20
6.
A machine is capable of ___.
a)
reducing the amount of work that is done
b)
multiplying the input force
c)
increasing energy
d)
very much
7.
Where is the fulcrum on a first class lever?
a)
On the input force end
b)
On the output force end
c)
in the middle
d)
depends on the application
8.
A wheelbarrow is an example of a ___.
a)
first-class lever
b)
second-class lever
c)
first-class jerk
d)
farmer's best friend
9.
Which of these is NOT a simple machine?
a)
a lever
b)
a wedge
c)
a screw
d)
a pair of scissors
10.
What is the MA of a single fixed pulley?
a)
1
b)
2
c)
3
d)
4
11.
What is the MA of a single movable pulley?
a)
1
b)
2
c)
3
d)
4
12.
An inclined place changes the direction and ___ of the force.
a)
slope
b)
magnitude
c)
vector
d)
the dark side
13.
Which of these is a compound machine?
a)
a pulley
b)
a ramp
c)
a lever
d)
a pair of pliers
14.
Gravitational PE depends on the ___.
a)
mass of the object
b)
height of the object
c)
accleration due to gravity of the object
d)
all of these
15.
GPE= ?
a)
av2
b)
mgh
c)
mv2
d)
mv
16.
If the efficiency of a machine is 80%, if you put 100J into the machine, how much will you get out?
a)
8
b)
80
c)
50
d)
800
17.
An object weighing 10N falls 10m. How much work does gravity do on the object?
a)
10 Watts
b)
100 Watts
c)
10 J
d)
100 J
18.
The Law of the Conservation of Energy states that ___.
a)
Energy must be conserved by switching to LED lighting.
b)
energy is a variable in all equations
c)
energy cannot be created or destroyed
d)
people who waste energy will be punished severely.
19.
Energy = ?
a)
Pulley
b)
efficiency
c)
Joules
d)
Mechanical Advantage
20.
Kinetic energy = ?
a)
energy of motion
b)
stored energy
c)
Watts
d)
Newtons
21.
Simple machine = ?
a)
energy
b)
pulley
c)
bicycle
d)
Newtons
22.
Potential energy = ?
a)
stored energy
b)
energy of motion
c)
Watts/sec
d)
Farads
23.
Workin vs workout = ?
a)
energy
b)
watts
c)
efficiency
d)
Newtons
24.
Power = ?
a)
Newtons
b)
Watts
c)
Joules
d)
Eddie Perez
25.
Why is a perpetual motion machine not possible?
a)
gravity
b)
power
c)
friction
d)
none of these
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