FM: Lesson 4.1a (10/20)

Last updated over 2 years ago

9 questions

FM: Lesson 4.1a (10/20)

Last updated over 2 years ago

9 questions

Objective: 
SWBAT identify the frictional force acting on objects and determine the correct direction by analyzing a series of real world scenarios.

Do Now: 

How does friction impact a vehicle's change in speed or acceleration after a force is applied?

Guided Notes: Energy

Video :
The distance the puck travels depends on the strength of friction between the puck and the surface.

Rank the (tile, carpet, and sandpaper) from strongest to weakest friction force:

. Strongest friction force
.
. Weakest friction force

A stronger friction force causes objects to stop quickly.
A weaker friction force cause objects to stop in a longer period of time.

Draggable item		Corresponding Item
Sandpaper		Weakest Friction
Carpet		Strongest Friction
Tile		Moderate Friction

Why did Vehicle 2 fall off the cliff in Claire’s test of the collision scene, but Vehicle 2 did not fall off the cliff in the film Iceworld Revenge?

Independent Practice:

Examine each evidence card. Annotate the cards to help you think about the evidence. Then, use the following questions as a guide for discussing each card.
What questions do you have about the information on the card?
What does the evidence tell you about how the force of friction might have affected each car’s velocity change?
What does the evidence tell you about how the mass of each car might have affected its velocity change?

Claim 1: The vehicles in Iceworld Revenge had different masses; in Claire’s test, the vehicles had the same mass.

Claim 2: The friction of the surface that was used in Iceworld Revenge was different from the friction of the surface in Claire’s test.

What do you think might cause Vehicle 1 to slow down AND STOP before the collision?

How is the amount of friction Vehicle 1 experiences related to the impact of a collision?

What conclusions can you draw from the fact that it moves only a little and does not fall off the cliff?

What would the result be if Claire chose a mass of Object B that was too big or too small?

Exit Ticket:

How could differences in friction cause changes in velocity after the collision?

How could differences in mass cause changes in velocity after the collision?

What material would you recommend Object A and B be for Claire? Assuming the ratio of the two vehicles were different masses in Iceworld Revenge compared to Claire’s test?

CFS:
accurately identifies the changes to each object in a collision
accurately describes the relationship between force, mass and velocity in a collision
accurately identifies the strongest source of evidence from the scientific data