Physics Review

Retest Eligibility

• Corrections complete and checked by teacher• Answer document signed by parent• Physics retest worksheet complete– questions wrong on WS will be 1 point off of retest

grade• Mandatory tutorial session – (make sure you signed in!!!)

1. List 3 things that can cause a change in velocity.

• Change in speed• Change in direction • Change in both speed and direction

How much faster are they moving at 25 seconds compared to 5 seconds.

0 10 20 30 40 50 60 70 80 90 1000

5

10

15

20

25

30

35

40

Trip to the store

Time (seconds)

Sp

ee

d (

mile

s/h

ou

r)

What is the independent variable?

0 10 20 30 40 50 60 70 80 90 1000

5

10

15

20

25

30

35

40

Trip to the store

Time (seconds)

Sp

ee

d (

mile

s/h

ou

r)Dependent variable?

Is the red or blue line going faster at 3-4 hours into trip?

0 1 2 3 4 5 6 70

50

100

150

200

250

300

350

400

450

500

Series1Series3

Time (hours)

Dis

tanc

e (K

ilom

eter

s)

Tile SandPaper Wax Paper0

100

200

300

400

500

600

700

Series1

Dis

tanc

e Ca

r Tra

vels

(cm

) What is the dependent variable?

Independent variable?

Type of Surface

If an action force is a golf club hitting a ball, what is the reaction force?

• The ball hits the golf club

If a desk pushes down with a force of 50N , what direction and magnitude is the force of the floor on the desk?

• 50N Up

If a rocket is moving at 100meters per second, what will happen to speed if:

• Forces are balanced?• It will keep moving 100m/s

• It turns on it’s engines?• It will change velocity• (speed up, slow down, change direction

depending on direction of engine force)

If the length of the arrows represent the magnitude, Which direction will this object move?

• Down and to the right

What is the acceleration of the car in the graph?

• How long it takes speed to change D speed

D time• 40mph in 20 seconds

• Or

• 2mph every second0 5 10 15 20 25

0

5

10

15

20

25

30

35

40

45

Series1

Time (seconds)

Spee

d (m

ph)