2. Apr 1 / Act E 77
Mass and Collisions
LEARNING TARGET: I can explain the relationship between mass and force.
CH Q
Does the mass of an object affect the force it applies during a collision?
VOCAB: mass weight

3. mass weight "stuff" / matter that makes up things (does NOT change)
force created by gravity pulling on a mass
(on Earth mass and weight just happen to be equal)

4. PROCEDURE AND DATA
MATERIALS:
PROCEDURE: Read on pg. E and summarize
DATA: WS Mass and Collision
Write prediction AND procedure

5. Pre-lab control data:
Find the speed of an empty cart traveling 50cm down the ramp from release height A.
Repeat with 1, 2 & 3 metal cylinders.
Design data table on back of data sheet.
# cylinders
Distance (cm)
Time (s)
Calculations
Speed (cm/s)
100 cm 1 2 3
Next: Do lab following your procedure

6. The object’s mass does NOT affect how fast something falls
POST DISCUSSION
Thought… Why did the heavier cart push the block further?
Does a heavier mass fall with faster Speed than a lighter one? Explain.
The object’s mass does NOT affect how fast something falls
(air resistance can)
show penny drop, then Apollo, then Crash Course vids

7. What is the relationship between mass, distance and the potential force of the cart?
Hint:
Since larger mass does not cause a faster Speed (all trials were at same release height);
The longer distance the block moves MUST be because of the mass – not Speed
The larger mass has more potential force and causes the block to move a farther distance.

8. ANALYSIS
- Discuss and answer Q 1 & 4 on pg. E 20
ANS CH Q
Does the mass of an object affect the force it applies during a collision? A:
yes, light mass has less force than a heavy mass going the same Speed
HOMEWORK
Journal AQs
Vocab