Review Packet 1/4/2021

Review Packet 1/4/2021

Review video

https://youtu.be/-lOyW3pEUl0

Multiple Choice

What is a force?

• a push or a pull.

• a push or a slide

• gravity

• air resistance and gravity together

Multiple Select

Forces allow objects to

• Start moving

• Stop Moving

• Change Direction

• Change Speed

• Change color

Multiple Choice

Megan throws a marker in the air. What is the cause of the marker falling to the floor?

• Magnetic force pushes the marker back to the floor.

• Gravity pulls the marker back to the floor.

• The sun pushes the marker back to the floor.

• Friction pulls the marker back to the floor

Multiple Choice

Multiple forces act on Michelle when she rolls across the classroom carpet.Which statement best describes how friction affects the motion of Michelle?

• Friction causes Michelle to bounce.

• Friction causes Michelle to decrease in speed.

• Friction causes Michelle to increase in speed.

• Friction causes Michelle to roll forward then backward.

Multiple Choice

A man is experimenting with a Ferrari on a smooth, wooden ramp.If he wants to increase the speed of the car down the ramp, what should he do?

• decrease the angle of the ramp

• decrease the height of the ramp

• increase the force applied to the car

• increase the friction between the car and the ramp

Net force Refresher

https://www.youtube.com/watch?v=_trBkOpjxpM

Calculate the Net force Breakout room

https://docs.google.com/presentation/d/1Xx8dWgLIRQ8xIktCpp_KglLbE-1k7yjcCZxbv91I320/edit#slide=id.gb1b1858e96_0_0

Multiple Choice

What is Net force?

• is the sum of all forces acting on an object.

• Net force depends on the amount of gravity

• net force cannot be found

• is the difference of all forces acting puling on an object

Multiple Choice

What gives an object a net force of zero?

• the forces acting on each side of the object are equal

• the forces acting on each side of the object are unequal

• the force of gravity acting on each side of the object are equal

• the force of gravity acting on each side of the object are unequal

Multiple Choice

Why does it take more force to move a heavy box up a ramp than to move the same box down the ramp?

• There is more friction on the bottom of the box when going up a ramp.

• Gravity is pushing the box up the ramp at the same time you are pushing the box up the ramp.

• You are exerting force from both your arms and legs when you are pushing the box up the ram

• When you push an object up a ramp, you are working against gravity which pulls the box towards the ground.

Balanced and unbalanced forces

https://www.youtube.com/watch?v=tS8w-CXJehk

Multiple Choice

What are balanced forces?

• are opposing forces of different strengths acting on an object

• is the same force on the same side of an object of equal forces

• are opposing forces of the same strength acting on an object

• forces cannot be balanced

Multiple Choice

Balanced forces result in NO CHANGE in the motion of an object

• true

• false

Multiple Choice

When playing a game of tug-of-war, what could be the reason for neither side falling forward?

• there is unequal pull on both sides

• there is equal pull on both sides

• there is neither an equal pull or unequal pull on both sides

• one side is stronger than the other

Multiple Choice

Balanced forces cause a change in motion

• True

• False