science test gr8 chptr2 2

Question 1

6 simple machines

Answer 1

inclined plane, wedge, screw, levers, wheel and axle, pulley

Question 2

gears+2 examples

Answer 2

a modified wheel n axle with rigged wheels
worm gear
follower gear

Question 3

screws+2 examples

Answer 3

an inclined plane thats been cut into the core
augers
archimedes screw

Question 4

difference between mass and weight

Answer 4

Mass is a measure of the amount of matter or material in an object, while weight is a measure of how strong the force of gravity is between
two objects.

Question 5

mechanical advantage

Answer 5

the ratio of input to output force of a given machine

Question 6

MA formulas

Answer 6

effort arm length/load arm length
output force/ input force
input distance/ output distance

Question 7

work definition and formula

Answer 7

the result when a force moves
an object a certain distance
w=fd
forcedistance
J=N*M

Question 8

inclined plane

Answer 8

tilted, flat surface
ramp
stairs

Question 9

wedge (optional)

Answer 9

a modified inclined plane that can be moved back and forth with ease.
an axe, door stopper,

Question 10

levers

Answer 10

A lever is a rigid bar that pivots at a point called the fulcrum.
scissors
wheelbarrow

Question 11

wheel and axle

Answer 11

car steering wheel
bicycle pedals

Question 12

pulley

Answer 12

Pulleys are used to help lift heavy loads or
change the direction of a force.

Question 13

scissors

Answer 13

1st class

Question 14

wheelbarrow

Answer 14

class 2

Question 15

fishing rod

Answer 15

class 3

Question 16

seesaw

Answer 16

class 1

Question 17

stapeler and nutcracker are 2nd class