Posted by **Annette** on Monday, April 29, 2013 at 11:08am.

A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s.

(a) Calculate the mechanical work done by the sprinter during this time.

J

(b) Calculate the average power the sprinter must generate.

W

(c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories?

(d) What happens to the other 75% of the food energy being used?

This answer has not been graded yet.

- physics -
**Henry **, Tuesday, April 30, 2013 at 3:27pm
See previous post.

## Answer this Question

## Related Questions

- physics - A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s...
- physics - A sprinter mass 72 kg runs the 50 meter dash in 8.35 s. Assume that ...
- college physics - A sprinter can reach a speed of 9.0 m/s in 1.0 s. If the ...
- PHYSICS - PLEASE HELP - A 66 kg human sprinter can accelerate from rest to 11 m/...
- physics - A sprinter can reach a speed of 12 m/s in 0.96 s. If the sprinter’s ...
- Physics - A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest...
- physics - A 66 kg human sprinter can accelerate from rest to 11 m/s in 3.4s. ...
- Physics - The best sprinters can run a 100 m in 10.0 s. A 77.2 kg sprinter ...
- Physics - A 65 kg sprinter completes a 100 m race in 9.83 s. Calculate the ...
- Physics - A 73kg sprinter, starting from rest, reaches a speed of 7.0 m/s in 1....

More Related Questions