midterm exam

Question 1

mass

Answer 1

amount of matter

Question 2

centripetal force

Answer 2

a force that causes something to move in a circle

Question 3

inertia

Answer 3

resistance to change

Question 4

newtons 1st law

Answer 4

law of inertia

Question 5

2nd law

Answer 5

f=ma

Question 6

3rd

Answer 6

equal and opposite reactions

Question 7

unit for energy

Answer 7

joules

Question 8

types of simple machines

Answer 8

wedge, axle, lever, pulley, inclined pland, wheel, screw

Question 9

Work

Answer 9

Force applied to an object that moves.

Question 10

Effiency

Answer 10

energy output/input

Question 11

Curcuit

Answer 11

A path along which electricity flow

Question 12

A switch

Answer 12

electrical component that can break a circuit

Question 13

insulator

Answer 13

materials that dont conduct eletricity

Question 14

reflection

Answer 14

change in direction of wavefront

Question 15

diffration

Answer 15

Change in direction of a wave as it bends around an object

Question 16

refraction

Answer 16

change in direction of a wave as it passes through a medium

Question 17

C.N fraction

Answer 17

2 waves joining together to make a bigger wave (crest & crest)

Question 18

D.N interference

Answer 18

2 waves joining together to make a smaller wave- (crest&though)