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- 1. Multiple Choice
You cleaned your garage and decided to move your workbench to the other side of the space. If you pushed the workbench 10 meters with 200 N of force, how much work did you do? (Remember 1J = 1Nm)
20 Watts
2000 Watts
20 Joules
2000 Joules
- 2. Multiple Choice
The process by which your car engine burns gasoline is called _____________________.
condensation
combustion
convection
conduction
- 3. Multiple Choice
In the picture above, which of the following simple machines are found?
screw and pulley
screw and wheel / axle
inclined plane and wheel / axle
pulley and wedge
- 4. Multiple Choice
Temperature is a measure of _________________ of the particles in an object.
the average kinetic energy
the sum of the potential and kinetic energy
the difference between the potential and kinetic energy
the average potential energy
- 5. Multiple Choice
You are loading heavy boxes onto the back of a truck. How does a ramp make it easier for you to get the boxes onto the truck?
by increasing the amount of work required to move the boxes
by decreasing the amount of force required to move the boxes
by decreasing the distance the boxes move
by increasing the amount of force required to move the boxes
- 6. Multiple Choice
Consider the bicycle, the wheels consist of wheels and axles, the handbrakes and gear shift are levers, and the chain is a pulley. This combination of two or more simple machines is called a(n) ________________.
block and tackle
simple machines
third-class levers
compound machine
- 7. Multiple Choice
Radiant energy from the sun is transformed to _______________ energy in plants during photosynthesis.
nuclear
thermal
mechanical
chemical
- 8. Multiple Choice
At what point on a vert ramp will the skateboarder have the highest gravitational potential energy (GPE)?
at the lowest point on the ramp
at the top of the vert
whie on the decline
while on the incline
- 9. Multiple Choice
Heat is thermal energy transferred from object to another because of a difference in __________________.
mass
volume
potential energy
temperature
- 10. Multiple Choice
When a cold can of soda is insulated, the heat flow into the can on a hot day ____________________.
increases
decreases
stays the same
both b and c
- 11. Multiple Choice
What kind of thermal energy transfer occurs when the sun warms sand on a beach?
radiation
convection
condensation
conduction
- 12. Multiple Choice
A car's engine is turned off and cools down to ambient temperature. The car's engine cools because ______________.
(Ambient temperature = temperature of the surrounding air)
the engine does not hold heat very well.
the ambient air transfers cold energy to the engine.
heat energy is transferred from the hot engine to the cooler ambient air.
the thermal energy is destroyed through the interaction with the surroundings.
- 13. Multiple Choice
Power id measured in _______________.
joules
watts
meters per second
seconds
- 14. Multiple Choice
How much energy did you deliver if you used 10 Watts of power over 10 seconds? (Remember P=E/t)
1000 Joules
100 Joules
10,000 Joules
10 Joules
- 15. Multiple Choice
The kinetic energy of an object increases as its ___________ increases.
gravitational energy
potential energy
velocity
specific heat
- 16. Multiple Choice
The law of conservation of energy states that the total amount of energy in the universe ________________________.
increases
decreases
changes constantly
remains constant
- 17. Multiple Choice
Calculate the GPE (gravitational potential energy) of a 2 kg. ball on a roof 10 m above the ground? (Remember GPE=mgh)
1960J
196J
19.6J
1.96J
- 18. Multiple Choice
Screws and wedges are _____________________.
modified inclined planes
levers
block and tackles
fasteners
- 19. Multiple Choice
What is the ratio of output work to input work?
mechanical advantage
power
potential energy
efficiency
- 20. Multiple Choice
The amount of kinetic energy in a moving object depends on its ________________________.
mass and velocity
mass and distance
mass and height
mass and surface area
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