Energy of Motion Unit Test

Question

10 of 1010 of 10 Items

Question
An athlete is practicing shotput using a 16-pound shot, and he throws it 40 feet. He then uses a 12-pound shot and throws it 50 feet. In three to four sentences, explain why there is a difference in these throws using the ideas of mass and speed and how each relates to kinetic energy.(4 points)

Short Answer Rubric (4 points)
Points Awarded Criteria
4
The answer is very clear.

The answer is fully supported by details.

There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

3
The answer is mostly clear.

The answer is supported by mostly relevant details.

There are a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

2
The answer is somewhat clear.

Details are weak or not related.

There are some errors in grammar, usage, and mechanics. Errors interfere with meaning.

1
The answer is not clear.

There are few or no supporting details.

There are many errors in grammar, usage, and mechanics. Errors interfere with meaning.

0 The question is not answered.

Answer 1

The difference in throws can be explained by the concepts of mass and speed. The athlete is able to throw the 16-pound shot a shorter distance because it has more mass, making it harder to accelerate and achieve a higher speed. On the other hand, the 12-pound shot has less mass, allowing the athlete to accelerate it more easily and achieve a higher speed, resulting in a longer throw. Therefore, the kinetic energy of the 12-pound shot is greater than that of the 16-pound shot.