All
The force exerted by a machine is:
a) input force
b) output force
c) simple force
What is output force (b)
Give an example of an object with elastic potential energy? HINT: think experiment
Rubber band
Which of the following is a unit of work?
a) watt
b) joule
c) newton
What is a joule
The distance the output force is exerted through, or how far the load moves is called
a) output loadb) output pathway
c) output distance
What is output distance (c)
a) a speeding car
b) a stretched bowstring
c) sunlight
What is sunlight (c)
Power is equal to work divided by which of the following variables?
a) time
b) distance
c) force
What is time (a)
The ability to do work is called:
a) energy
b) power
c) force
What is energy (a)
a) potential energy
b) mechanical energy
c) thermal energy
What is thermal energy
If the speed of an object doubles, what happens to its kinetic energy?
a) KE quadruples
b) KE doubles
c) KE is halved
Its kinetic energy quadruples (a)
The energy of an object due to its motion
What is kinetic energy
What is energy stored in the bonds between atoms and molecules called?
a) kinetic energy
b) mechanical energy
c) chemical energy
What is chemical energy
What other type of simple machine can be a screw be considered a type of?
a) lever
b) inclined plane
c) wedge
What is an inclined plane (b)
Energy that is stored as a result of position or shape
What is potential energy
What is work?
a) the product of force and distance
b) the sum of power and force
c) the product of speed and force
What is the product of force and distance (a)
Mechanical energy is:
a) the sum of an object's kinetic and potential energy
b) the sum of motion and force
c) the sum of power and force
What is the sum of an object's kinetic and potential energy (a)