Test 2

Question 1

What causes accelerations?

Answer 1

Forces

Question 2

What is Newtons 2nd law of Motion?

Answer 2

F=ma
Force = mass x acceleration

Question 3

What is Newtons 3rd law of Motion?

Answer 3

For every force there is another force equal size pointing in the opposite direction.

Question 4

What are the principles of Motion?

Answer 4

Newtons 1st, 2nd, and 3rd law

Question 5

What is momentum?

Answer 5

The quantity of motion.

MV=momentum
Mass x Velocity = momentum

Question 6

What is a Newton?

Answer 6

A force measured kg x m/s^2

Question 7

What is the difference between weight and mass?

Answer 7

Weight is the force of gravity. Mass is the quantity of matter.

Question 8

What makes friction force?

Answer 8

Coefficient of friction (roughness) x Normal force (contact force)

Question 9

What is sin?

Answer 9

Opposite/ hypotenuse

Question 10

What is cosine?

Answer 10

Adjacent / hypotenuse

Question 11

How do you find normal force?

Answer 11

You break down the y forces

Question 12

Formula for the force of a spring. And what do the variables mean.

Answer 12

Fspring=K^X

Force of the spring = K (spring constant which means the “stiffness”) times the change of distance

K is measured [N]/[m]

Question 13

What is published in 1689 and by who?

Answer 13

Newton publishes “principia”

Question 14

What observations were made in Newtons “principia”?

Answer 14

1) Tides.
-the highest tides of the month have new moon/full moon
- highest rides of the year are during summer

2) Saturn and Jupiter have an equatorial bulge
-he predicts earth bulge

3) Explains earths precession
-by the two different sides of the earth using the equator

4) Edmond Halley
-predicts comet will return in spring 1758
-measuring in 1682
-must be the same comet seen in 1531 and 1607

Question 15

What is a force applied over time?

Answer 15

Impulse

FT=impulse

Question 16

What is a force applied over a distance?

Answer 16

Work

F🔺x=work

Question 17

How do you find change in momentum?

Answer 17

MVf-MVi

Mass x Velocity(final) - Mass x Velocity(initial)

Question 18

What is a measure of motion with no direction?

Answer 18

Kinetic energy

Question 19

Formula for kinetic energy

Answer 19

1/2 mv^2

1/2 mass x velocity ^ 2

Question 20

Textbook definition for energy

Answer 20

Ability to do work

Question 21

Professor definition for energy

Answer 21

There is an equivalence between a specific quantity of motion and any arrangement of matter.

Question 22

What does positive and negative mean with kinetic energy?

Answer 22

Positive means adding motion
Negative means removing motion

Question 23

What is kinetic energy (final)?

Answer 23

Force of gravity times change in direction.

Question 24

Energy is what?

Answer 24

Energy is conserved. It is never created or destroyed, only converted from one form to another.

Question 25

What is PEgravity?

Answer 25

Fgrav🔺x=ma(g)h Force of gravity times change in distance = mass times acceleration of gravity times height

Question 26

What is PEfriction?

Answer 26

Ffriction🔺x=uN🔺x Force of friction times change in distance = coefficient of friction times Normal force times change in distance

Question 27

What is PEspring?

Answer 27

Fspring🔺x=1/2K🔺x^2 Force of spring = 1/2 times K constant times change in distance squared