review for unit 2 test (1d motion)

Review for Unit 2 Test (1D Motion)

Heaton Fall 2-14

Bridge Due Tomorrow

• See rubric for details on all documents needed

What are the units for?

• Force• Mass• Velocity• Acceleration• Distance

What is on the test?

• Format: Multiple Choice and Open Ended

Name that force…

• Upward force of ice on a hockey puck– Normal Force

• Force that slows down a car that is coasting in neutral– Force of Friction

• Force that pushes a rocket ship that is firing its engines up– Force of Lift (Force of Applied)

• Force in a string that holds a painting hung on a wall– Force of Tension

Inertia

• What is inertia?– an objects tendency to avoid change– Property of matter– Increases with Mass– Newton’s First Law is also called Law of Interia– Ex) more massive objects are harder to move– Ex) If you left this room as is and returned a 100

years later, it would still be the same (minus decay and dust)

FBD of a rocket accelerating into spacehttp://www.sciencelearn.org.nz/Contexts/Rockets/Science-Ideas-and-Concepts/Lift-off

Question 5

• 1.39 x 10^-8 N

Question 6

• 5.84 x 10^-10

Question 7

• Fnet = m a = 4000 N

Question 8

• 4.41 N

Question 9

• 4410 N

Question 10

• -3060 N

Question 11

• 0.19

• No units for coefficient of friction, because the units should cancel each other out.

Question 12

• -750 N

Question 13

• Fnet = 280 N• W = Fg = 84 kg• A = 3.3 m/s^2

Question 14

• a = 34.1 m/s/s

• Fnet = (29,545 kg) (34.1 m/s/s) • = 1,007,484.5 = 1.0 x10^6

Question 15

• 166.6 N