midterm exam Flashcards
1
Q
mass
A
amount of matter
2
Q
centripetal force
A
a force that causes something to move in a circle
3
Q
inertia
A
resistance to change
4
Q
newtons 1st law
A
law of inertia
5
Q
2nd law
A
f=ma
6
Q
3rd
A
equal and opposite reactions
7
Q
unit for energy
A
joules
8
Q
types of simple machines
A
wedge, axle, lever, pulley, inclined pland, wheel, screw
9
Q
Work
A
Force applied to an object that moves.
10
Q
Effiency
A
energy output/input
11
Q
Curcuit
A
A path along which electricity flow
12
Q
A switch
A
electrical component that can break a circuit
13
Q
insulator
A
materials that dont conduct eletricity
14
Q
reflection
A
change in direction of wavefront
15
Q
diffration
A
Change in direction of a wave as it bends around an object
