science

Question 1

What is Friction?

Answer 1

A force that acts in a direction opposite the motion of an object (a force repelling the motion)

Question 2

Factors that affect the amount of friction:

Answer 2

1. Force between objects
   2.Type of Surface
   3.Surface Area

Question 3

Types of Friction:

Answer 3

1. Static Friction
2. Sliding Friction
3. Rolling Friction
4. Fluid Friction

Question 4

What is Gravity?

Answer 4

force of attraction between all objects in the universe

Question 5

Mass: (based on our notes)

Answer 5

greater mass=greater gravity, all objects have mass

Question 6

Distance: (based on our notes)

Answer 6

Greater distance=less gravity

Question 7

G-Force (based on our notes)

Answer 7

A force of gravity on your body

Question 8

What does positive G force do? (+G)

Answer 8

feel heavy/gravity pulling you down

Question 9

What does Negative G force do?
(-G)

Answer 9

feel light/lifting out of seat

Question 10

What is the number limit of G forces that you can experience before it’s dangerous?

Answer 10

4 g forces

Question 11

What is the formula for weight?

Answer 11

Mass x 9.8 earths gravity

Question 12

What is weight?

Answer 12

The measure of the force of attraction between objects due to gravity

Question 13

What is acceleration?

Answer 13

the rate of change in velocity (speeding up or slowing down)

Question 14

What is positive acceleration?

Answer 14

Speeding up

Question 15

What is negative acceleration?

Answer 15

Slowing down

Question 16

What is Air Friction?

Answer 16

air friction is a force of air that acts against the falling object

Question 17

What is Terminal Velocity?

Answer 17

The point where a falling object no longer speeds up (starts falling at a constant speed)

Question 18

What is a Simple Machine?

Answer 18

one machine with one or few moving parts

Question 19

What does a Simple Machine do?

Answer 19

It makes work easier (But does not make less work)

Question 20

What is Input Force?

Answer 20

Force applied TO the machine

Question 21

What is Output Force?

Answer 21

Force applied BY the machine

Question 22

What is a Lever?

Answer 22

A simple machine with a fixed pivot point (fulcrum)

Question 23

Where is the Fulcrum in Class 1 Of levers?

Answer 23

The middle (seesaw example)

Question 24

Where is the Fulcrum in Class 2 of the levers?

Answer 24

The front (wheelbarrow example)

Question 25

Where is the Fulcrum in Class 3 of the levers?

Answer 25

The bottom (fishing pole example)