Unit 2, Day 18

Agenda Announcements Equation Compilation Variables and Units (Review) Challenge Problems Challenge Problem A Review Break Challenge Problem B Review (Whiteboards) Break Whiteboards (Force Addition, Newton’s 3rd

Law)

Announcements

Beach Clean

“The ocean is art, so why make it smell like fart?”

November 11th

Playa Del Rey Beach

10am-12pm

Service Hours and a Good Cause

Email Bri Harris at

makewavesnotwaste@gmail.com

If you were absent Tuesday, I need your

booklet/placard

Kinematic and Force Equations

EquationIncluded Variables

Not Included Variables

Average VelocityChange in

DisplacementChange in Time

AccelerationFinal VelocityInitial Velocity

Final VelocityInitial VelocityAcceleration

Change in Time

Change in Displacement

Average Velocity

Average VelocityFinal VelocityInitial Velocity

AccelerationChange in

DisplacementChange in Time

Name: _______________________

Variables and UnitsSymbo

lName Description Units

a

F

m

∆t

vavg

v0

vfinal

∆x

Challenge Problems

Each person at your table has a DIFFERENT

PROBLEM

You are only allowed to consult table members

Table members will NOT do the work for you!

You may NOT use notes

These will be turned in to Mrs. Larkin for an HOM grade

Preparation for our exam

Thursday 11/14 (even classes)

Friday 11/15 (odd classes)

Whiteboards

60 seconds to choose a school appropriate

name

Don’t shout out answers

Lift boards up after 5-4-3-2-1-0

If every group gets it, no points added

Challenge Problem Form A A 45 kilogram child on a skateboard starting at

rest experiences a force of 65 Newtons to push them forwards. After 13 seconds, what is the child’s displacement?

Switch!

Challenge Problem Form A A 45 kilogram child on a skateboard starting at

rest experiences a force of 65 Newtons to push them forwards. After 13 seconds, what is the child’s displacement?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form A A 45 kilogram child on a skateboard starting at

rest experiences a force of 65 Newtons to push them forwards. After 13 seconds, what is the child’s displacement?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form A A 45 kilogram child on a skateboard starting at

rest experiences a force of 65 Newtons to push them forwards. After 13 seconds, what is the child’s displacement?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form A A 45 kilogram child on a skateboard starting at

rest experiences a force of 65 Newtons to push them forwards. After 13 seconds, what is the child’s displacement?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Break 3.5 minute break

Challenge Problem Form B A child on a skateboard starting at rest

experiences a force of 62 Newtons to push them forwards. When the child has travelled 15 meters, they are at a velocity of 6 m/s. What mass must the child have been?

Switch!

Challenge Problem Form B A child on a skateboard starting at rest

experiences a force of 62 Newtons to push them forwards. When the child has travelled 15 meters, they are at a velocity of 6 m/s. What mass must the child have been?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form B A child on a skateboard starting at rest

experiences a force of 62 Newtons to push them forwards. When the child has travelled 15 meters, they are at a velocity of 6 m/s. What mass must the child have been?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form B A child on a skateboard starting at rest

experiences a force of 62 Newtons to push them forwards. When the child has travelled 15 meters, they are at a velocity of 6 m/s. What mass must the child have been?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Switch!

Challenge Problem Form B A child on a skateboard starting at rest

experiences a force of 62 Newtons to push them forwards. When the child has travelled 15 meters, they are at a velocity of 6 m/s. What mass must the child have been?

Plug in the variables into the equation you chose and solve for the missing

variable. Show work in this box.

Break 3.5 minute break

Whiteboards A 13-Newton force is pushing to the right and

a 19-N force is pushing to the left.

In which direction does the box move?

With what force does the box move in that direction?

What force (amount and direction) would you need to add to keep the box still?

Switch!

Whiteboards A student holds a book at rest in an

outstretched hand. The force exerted on the book by the student is equal to the book’sA. MassB. WeightC. AccelerationD. Velocity

Switch!

Whiteboards

In which direction will this block move?

What is the force that the block will move with?

What is the block’s acceleration?

Switch!

Whiteboards A soccer player kicks a 0.5 kg stationary ball

with a force of 45-Newtons. What is the force on the player’s foot?

Switch!

Whiteboards A person is standing on a bathroom scale.

They then jump upwards. At the instant the student pushes off, what happens to what the scale says about the weight?

Homework

Unit 2 Exam

Thursday 11/14 (even periods)

Friday 11/15 (odd periods)

If you want to review these problems, the

solutions will posted on my YouTube at 4PM.