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WorksheetsSci9 09-01 Chapter 9 Review
Total questions: 52
Worksheet time: 57mins
Frederick von Foophenmeier pushes a parked car with a force of 200N. The car does not move. How much work did he do?
200 N
200 J
Zero
Cannot be determined due to his name
What are the units of Work?
J
N⋅m
kg⋅m/s2
They are all units of Work
Which of these processes requires the most work?
A 10 kg weight resting on a table
A person holding a 1 kg weight still with outstretched arms
A person lifts a 1 kg weight 1 m off the floor
A 10 kg ball is rolled across the floor at a constant speed for a distance of 10m
Benchley the robot pushes a crate along a floor by exerting a force of 50 N for 4.0m. How much work was done?
165 N
200 N
Zero
145 J
A dude presses a 400N weight 1.0 m over his head in 2 seconds. What was the Power?
100 N
25 W
400 W
200 W
What is the Mechanical Advantage of a ramp that is 10m long and 2m high?
20
5
5 MA's
15
A machine is a device that....
requires less work to do a given task
decreases the amount of work done by a given force
increases energy
can multiply and redirect an input force
A first class lever has the....
fulcrum at one end and the output force between the fulcrum and input force
fulcrum at one end and the input force between the fulcrum and the output force
fulcrum in the middle
input force in the middle
A wheelbarrow is an example of a...
first class lever
second class lever
third class lever
quantum leap lever
Which of these is NOT a simple machine?
a lever
a pair of scissors
a screw
a wheel and axle
What is the mechanical advantage of a single fixed pulley?
1
1.5
2
3
What is the mechanical advantage of a single movable pulley?
1
1.5
2
3
An inclined plane...
changes the direction of force only
changes the magnitude of the force only
changes both the magnitude and direction of the force
decreases the amount of work to be done
Which of the following is a compound machine?
wheel and axle
pulley
a pair of pliers
a ramp
Which of the following statements about work and energy are NOT true?
When work is done, energy is transferred and transformed.
Energy may be defined as the ability to do work.
Work and energy are always equal.
Work and energy have the same units.
What is the gravitational potential energy of a 10 kg box that is 2 m above the ground?
400 J
42 J
200 J
3920 J
Gravitational Potential Energy depends on....
the mass of the object
the height of the object
the acceleration due to gravity
All of these answers
A ball has a mass of 2kg and is thrown at a speed of 2 m/s. What is the kinetic energy of the ball?
There is not enough information to calculate this
4 J
7 J
2.5 J
The efficiency of a ramp is 75%. If 400J of work are input, what amount of work is output?
100 J
200 J
300 J
400 J
An object weighing 100N is dropped a distance of 5m. How much work is done by gravity?
100 J
100 Nm
500 J
Gravity is not alive, therefore no work can be done.
What simple machine is this?
Wheel and Axle
Inclined plane
Wedge
Screw
The Law of Conservation of Energy states that...
the energy of a system can disappear.
it is impossible to make a perpetual motion machine.
energy cannot change form.
energy cannot be created or destroyed.
J
Energy
Work
Newton-meters
All of these answers
N⋅m
Joules
Watts
Potential Energy
MA
What are the units for Mechanical Advantage?
MA's
Joules
Watts
There are no units
Work in vs. Work out
Mechanical Advantage
Efficiency
Work
Torque
Kinetic Energy
Energy of position
Energy of motion
Energy of Thor
Energy of Perpendicular Porgs
W
Whats
Watts
Watz
MegaWatz
In a formula, what does an upper case 'W' stand for?
Joules
Work
water
wafers
Stored energy
Watts
Potential Energy
Kinetic Energy
Gravitational Wave Energy
Power
Rate of Work
Watts
J/s
All of the above
What simple machine is this?
Wedge
Screw
Inclined Place
Leverl
What simple machine is this?
Staircase
Spiral Staircase
Screw
3rd Class lever
What simple machine is this?
1st class lever
2nd class lever
3rd class lever
4th class lever
What type of simple machine is this?
1st Class lever
2nd class lever
3rd class lever
1st class jerk
What do you get if you put two inclined planes together?
An airplace
A wedge
inclined planes squared
A triangular thingamabob
What do you get if you wrap an inclined plane around a cylinder?
A mess
A screw
A fulcrum and axle
A cylindrical plane
Using a first class lever, if the mechanical advantage is 10 and you input 10 N of force, how much force is output by the lever?
10 N
100 N
1,000 N
1 N
What is the mechanical advantage of an inclined plane that is 100m long and 10m high?
10,000
1,000
100
10
What is the mechanical advantage of this pulley system?
1
2
3
4
To calculate work, what units must be used?
Newtons and meters
Joules and meters
Watts and meters
Joules and kilograms
To calculate Power what units must be used?
Newtons, meters and seconds
Joules, centimeters and hours
Watts, meters and seconds
Newtons, watts and seconds
What is the mechanical advantage of a first class lever if the effort arm is 50m and the resistance arm is 10m?
500
50
5
.5
What formula is used to calculate Gravitational Potential energy?
PE=mgh
PE=1/2mv2
PE=Wd
PE=Fd
What is the gravitational potential energy of an object sitting on the ground?
Zero
Cannot be determined
9.8Nm
9.8 J
What simple machine is this?
Lever
Inclined Plane
Wheel and pulley
Wheel and Axle
What simple machine is being used here?
Wedge
Inclined plane
Wheel and Axle
Lever
What simple machine is being used here?
Inclined plane
Screw
Wedge
Wheel and Axle
What is the Gravitational Potential Energy of a paper airplane whose mass is 2kg and is 3 meters above the ground?
60 J
6 J
1.5 J
58.8 J
What is the Kinetic energy of a cat with a mass of 1.5kg that is sitting on the fence?
18 J
19 J
20 J
0 J
What is the mechanical advantage of a roller coaster that has a KE of 10,000J and a PE of 10,000 J?
10,000 J
100,000 J
20,000 J
0 J
What is the gravitational potential energy of a Panda with a weight of 100N who is 3m above the ground?
2,940 J
3,000 J
300 J
900 J
