Unit 2

Question 1

Keplers law of planetary motion

Answer 1

1st:law of ellipses=the orbit of planets is ellipses
2nd:law of equal areas=planet don’t move with constant speed around their orbits
3rd:law of periods= T ²/R ³ is the average distance from the sun is the same for all planets

Question 2

Centripetal force

Answer 2

A force pulls objects towards the center

Question 3

On PM horizontal distance

Answer 3

Δx=Voxt

Question 4

On PM final horizontal velocity

Answer 4

Vx=Vox

Question 5

On PM Final vertical velocity

Answer 5

Vy =Voy +gt

Question 6

I’m n pm vertical displacement

Answer 6

Δy=1/2gt ²

Question 7

On pm initial velocity

Answer 7

Vy=gt

Question 8

Time

Answer 8

√2 Δy/g

Question 9

Range

Answer 9

Vox √2 Δy/g

Question 10

On IM

Answer 10

Vox=vocos θ
Voy=vosin θ

Question 11

On I’m Horizontal velocity

Answer 11

Vx=vocos θ

Question 12

On im vertical velocity

Answer 12

Vy=vosin θ +gt

Question 13

Displacement

Answer 13

Δx=Vocos θt

Answer 14

Δy=vosin θ+1/2gt ²

Question 15

Maximum height

Answer 15

Vo ²sin ² θ
=Rtan θ/4

Question 16

Time on im

Answer 16

t= vosin θ/g

Question 17

Ttot

Answer 17

2vosin θ/g

Question 18

Range on IM

Answer 18

Vo ²sin2 θ/g

Question 19

Wav

Answer 19

Δ θ/t Δ

Question 20

Wav

Question 21

Wav

Answer 21

=wo+wf/2

Question 22

Δ θ

Answer 22

Δ θ =woΔt+ 1/2α Δt²

Question 23

Δ θ

Answer 23

Δ θ={wo+wf}/2 Δt

Question 24

α

Answer 24

Δ w/Δt

Question 25

Wf

Answer 25

wo+ α Δt

Question 26

Wf ²

Answer 26

Wf ²= Wo² +2 α Δ θ

Question 27

Δt

Answer 27

Wf-wo/α

Question 28

T

Answer 28

=rfsin θ

Question 29

I

Answer 29

=mr ²

Question 30

Δs

Answer 30

=r Δ θ

Question 31

V

Answer 31

= Δ θ/Δ t t

Question 32

A

Answer 32

Δ w/Δtr

Question 33

T

Answer 33

I α