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Physics Homework Question?

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Jane, looking for Tarzan, is running at top speed (4.9 m/s ) and grabs a vine hanging vertically from a tall tree in the jungle.

 

Part A 

How high can she swing upward?
 
Part B

 

asked Oct 2, 2015 in PHYSICS by anonymous

2 Answers

0 votes

(a)

Initially Jane is running along the ground with a velocty is 4.9 m/sec.

Kinetic energy : image.

Jane can swing up to some height h and momentarily comes to rest.

Potential energy : image.

From the law of conservation of energy, image.

image

Substitute image and image.

image

Therefore, Jane can swing 1.225 m high.

answered Oct 2, 2015 by Lucy Mentor
edited Oct 2, 2015 by Lucy
0 votes

(b)

From part (a): The Jane swings to a height image.

The height does not depends on the length of the vine or the rope.

Longer the vine, the smaller will be the angle required for Jane to swing to reach a particular height.

No, the height does not depends on the length of the vine.

answered Oct 2, 2015 by Lucy Mentor

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