Force Ppt Thursday

8/8/2019 Force Ppt Thursday

1/12

Balanced and Unbalanced Forces

SWBAT describe whether the force related to an objectsmotion is unbalanced or balanced and explain their rationale

for choosing or not choosing 1 of 4 answer choices.

BM#: 10, 22


2/12

Do Now

1. What is your goal grade for the2nd report period?

2. Name one thing you can dobetter second report period thanfirst report period.


3/12

Benchmark

Dont have all of the data yet

I think we did well!

For every point you got above the

Mastery average on thebenchmark, you get one ticket

(and one bonus point)!


4/12

Force

What is it?

A push or pull.

When you push or pull an object, you exert a

force on that object.

Is the force

exerted

here a push or pull?

Push

Pull


5/12

Force

SI unit for force is Newtons (N)

Both direction and strength

Represented by an arrow.

Are the forces shownworking together or

opposite?

Are the forces equal or

not? How do you

know?


6/12

Force

More than one force can act on an

object at one time.

Can be either balanced or

unbalanced


7/12

Balanced Forces

Equal forces acting on an object, in opposite

directions, do not change the objects motion.

Why is this an

example of a

balanced force?

book

table


8/12

Unbalanced Forces

Unequal force acting on an object

Cause a change in motion

Cause object to start moving, stopmoving or change direction.

Why is this an

example of a

unbalanced

force?

book

table


9/12

Guided Practice


10/12

Guided PracticeTwelve students played tug-of-war during Mr. Pops gym class. Fortwo minutes, each team of 6 pulled in opposite directions without

moving from their starting positions. What must be true about the

force being exerted?

a) The boys on each team exert more force than the girls._______________________________________________

b) One team exerts more force than the other so it is an

unbalanced force.

________________________________________________

c) Both teams exert the same amount of force so it is a balancedforce

________________________________________________

d) Both teams exert the same amount of force so it is an

unbalanced force

_________________________________________________

Distracter- Not enough information

Wrong- the same force for both teams

Correct balanced force no movement

Wrong unbalanced force exert differents amount of force


11/12

Independent Practice

Complete each question. Use

reading and notes if necessary.

Work silently and independently

When finished, complete exitassessment and begin homework.


12/12

Exit AssessmentSelect the correct response. Then, explain why the answer iscorrect and why the other answers are incorrect.

John and Mark were pushing a box in opposite directions.

John managed to move the box and Mark 2 feet. Which of

these statements must be true?

a) Balanced forces are acting on the box.

b) Unbalanced forces are acting on the box

c) Mark is applying the same amount of force as John.d) Mark stopped pushing the box.

Documents

Force Ppt Thursday