Name:__________________________________
Date:______________
Class:______
Investigation:Changes in Kinetic Energy Part 1 & 2
1. Goal/ Question: How much does doubling the speed or doubling the mass affect
the kinetic energy of an object and the resulting damage that it can do in a collision?
PART 1
2. Variables:
Variable
Definition
Independent
Scientist Actively Changes
Dependent
Measure to see if IV has an
affect on it
Controlled
Keep constant from one
test to the next
In this lab it will be:
In this lab it will be:
Investigation 1: Damage Comparisons
Condition A
Calibrate
mass
Condition B
Double Mass
Condition C
Double Speed
original:
double:
original:
time to reach the end
of the track (seconds)
original:
original:
half:
average cart
speed (cm/sec)
original:
original:
double:
length of the track
(cm)
Describe damage to
cracker
Before answering the below question, look at the results from other lab groups.
1.
Are your results similar or different to other groups? Why do you think that is?
2. How much does doubling the speed or doubling the mass affect the kinetic energy of an object and the
resulting damage that it can do in a collision?
Name:__________________________________
Date:______________
Class:______
PART 2 Investigation 2: Quantifying the Amount of Kinetic Energy for a Moving Object
Watch the videos posted to google classroom to answer the following questions
The same spring-scale launcher position (force in N) were used for these conditions as were used in
investigation 1
Condition A
Calibrate
Condition B
Condition C
mass (g)
original:
double:
original:
average cart speed (cm/sec)
original:
original:
double:
distance the box was pushed
before coming to a stop (cm)
1. After watching the first video predict:
a. When we double only the mass of the cart, how much further will it push the box?
b. When we double only the speed of the cart, how much further will it push the box?
2. After watching all three videos and completing the graphs answer the
following:
a. About how many times further did the box get pushed when the mass was doubled?
b. About how many times further did the box get pushed when the speed was doubled?
c. What does this tell us then about how much more kinetic energy the cart had in each
case?
d. If you tripled only the mass of the cart, how many times further will it push the box?
e. If you tripled only the speed of the cart, how many times further will it push the box?
Name:__________________________________
Date:______________
Class:______