Name: ______Hour______

Laboratory: Drop and Bounce (30 pts)

Background: Different matter responds differently to force. In this VIRTUAL LAB, you will explore the relationship between matter and energy by dropping objects made of different materials from different heights to see how high they bounce. You will be dropping these objects in a virtual lab setting where objects behave the same as they would in the real world.

If you drop a tennis ball from 10 feet, how high will it’s rebound be? Will it be half the height you drop it from? Will it be 1/3 of the height?

What if you drop each ball from increasingly higher heights? Is there a pattern that stay’s constant for each type of ball?

Hypothesis:

1.  Predict (THIS IS YOUR HYPOTHESIS as to what you think will happen when you drop each ball) how your graph will show a relationship between drop and bounce. Refer to the sample graphs in the Graph Interpretation Guide to help you. NOTE: There are SIX options for answers (see Graph Guide)….ONE of those 6 are options for answers below. (4 points)

Type of ball / golf ball
Hypothesis / If a golf ball is dropped, THEN it will rebound ______of it’s drop height
Type of ball / plastic ball
Hypothesis / If a plastic ball is dropped, THEN it will rebound ______of it’s drop height
Type of ball / rubber ball
Hypothesis / If a rubber ball is dropped, THEN it will rebound ______of it’s drop height
Type of ball / clay ball
Hypothesis / If a clay ball is dropped, THEN it will rebound ______of it’s drop height

Procedure

Open the Drop and Bounce Virtual Lab. http://k12.http.internapcdn.net/k12_vitalstream_com/CURRICULUM/928315/CURRENT_RELEASE/VHS_PHY_drop_bounce.html

1.  Click View the Tutorial and learn how this works.

2.  Perform trials from drop heights of 20 cm, 40 cm, 60 cm, 80 cm, and 100 cm. In all cases, record at least three trials in your data table and average the results to formulate a more accurate average bounce height.

3.  RECORD Data in the tables below.

4.  Answer all questions.

Score

5.  What is the goal of the lab or the question you tried to answer? (3 points)

(6 points)

Score

6.  Use the data from your experiment to complete this data table.

Answer:

Type of ball / Drop height (cm) / Bounce height (cm)
golf ball / 0 cm / 0 cm
20 cm
40 cm
60 cm
80 cm
100 cm
plastic ball / 0 cm / 0 cm
20 cm
40 cm
60 cm
80 cm
100 cm
rubber ball / 0 cm / 0 cm
20 cm
40 cm
60 cm
80 cm
100 cm
clay ball / 0 cm / 0 cm
20 cm
40 cm
60 cm
80 cm
100 cm

(6 points)

Score

7.  Graph your data.
a. Plot each ball on this grid.
b. Use a different symbol for each ball.
c. Make a key so that you are able to tell the plots apart.

Answer:

(8 points)

Score

8.  Did your data agree with your hypotheses? Explain by completing the chart. NOTE: Re-State your original hypothesis and then discuss in the ACTUAL section of the chart what your DATA reflects.

Answer:

Type of ball / golf ball
Hypothesis / If a golf ball is dropped, THEN it will rebound ______of it’s drop height
Actual
Type of ball / plastic ball
Hypothesis / If a plastic ball is dropped, THEN it will rebound ______of it’s drop height
Actual
Type of ball / rubber ball
Hypothesis / If a rubber ball is dropped, THEN it will rebound ______of it’s drop height
Actual
Type of ball / clay ball
Hypothesis / If a clay ball is dropped, THEN it will rebound ______of it’s drop height
Actual

(3 points)

Score

9.  Use your graph to predict how high the rubber ball would have bounced if you had dropped it from 120 cm. PLACE an actual DOT/MARK on the graph itself to represent your prediction. WRITE below a value for your prediction.

Answer:

Your Score / ___ of 30