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WorksheetsPS semester final
Total questions: 20
Worksheet time: 10mins
You build a simple machine to lift items into your tree house. The machine requires and input force of 25 N to lift the items with a weight of 125 N. What is the ideal mechanical advantage of the simple machine?
0.000258
100,215
5
0.20
What is the mechanical advantage of a ramp that is 8 m long and 2 m high?
16
0.25
85
4
I add a single pulley to a simple machine with a mechanical advantage of 2.5. How will the pulley change the mechanical advantage?
It will increase the mechanical advantage
It will decrease the mechanical advantage
It will not change the mechanical advantage
what is a pulley?
I apply 1,200 N of force to lift an object 20 meters. How much work did I do?
0 J
2400 J
600 J
what is a J?
Mass and speed both affect the amount of kinetic energy an object has, but ____________ has a greater effect.
mass
speed
volume
weight
At which position is potential energy the greatest?
W
X
Y
Z
When a car burns gasoline it creates hot air to move the pistons in the engine, which causes the car to move. What energy transformation occur from the fuel to the movement of a car?
thermal energy to mechanical energy
thermal energy to chemical energy to mechanical energy
chemical energy to thermal energy to mechanical energy
chemical energy to electrical energy
Which items would have this energy transformation: chemical energy -> electrical, light and thermal energy?
turning on a flashlight
playing a violin
digesting an apple
a refridgerator staying cold
energy of motion
kinetic energy
potential energy
movement
work
As _________ increases, potential energy increases.
speed
time
height
what is potential energy?
As the sun heats the air, the warm air rises. What type of energy transformation is this?
chemical to nuclear
electromagnetic to thermal to kinetic
earth, fire, wind and air
solar to electrical
Fireworks are amazing as their chemical potential energy is released. What does this chemical potential energy transform into?
kinetic, heat and light
kinetic, chemical heat and light
kinetic, chemical, heat light and sound
kinetic, chemical, heat, nuclear and sound
An object is glowing and you can feel the heat energy being radiated from it. What other system would represent the same type of energy transformation as the glowing object?
candle burning
a person eating
a laser pointer
plant leaves
Uranium is often used in nuclear power plants. The uranium is very unstable and splits into two different atoms. The energy released is used to heat water and create steam which turns turbines. What is the last energy transformation in the nuclear power plant?
lightning
the water molecules flow through a dam
a battery is used to generate electrons
the turbines then gnerate electricity
What is the input energy for a hair dryer? What is the output energy?
electrical, chemical
kinetic, thermal
electrical, thermal
nuclear, chemical
a quantity that expresses how much a machine multiplies force or distance
Simple Machine
Mechanical advantage
Compound machines
Energy
