Homework Help: ap physics

Posted by anna on Friday, February 25, 2011 at 4:52pm.

When a rattlesnake strikes, its head acceler-
ates from rest to a speed of 21 m/s in 0.46 s
seconds. Assume for simplicity that the only
moving part of the snake is its head of mass
200 g.
How much (average) power does the rat-
tlesnake need to accelerate its head that fast?
Answer in units of W.

ap physics - Damon, Friday, February 25, 2011 at 5:27pm
m = 0.2 kg
Ke = (1/2) m v^2 = work done = power*time
so
power = [(1/2) m v^2] / .46 Watts

Answer this Question

Related Questions

Physics - When a rattlesnake strikes, its head accelerates from rest to a speed ...
Physics - When a rattlesnake strikes, its head accelerates from rest to a speed ...
Physics - When a rattlesnake strikes, its head accelerates from rest to a speed ...
physics - An electron in the cathode ray tube of a tele- vision set enters a ...
physics - The head of a rattlesnake can accelerate 50 m/s2 in striking a victim...
Physics - High-speed stroboscopic photographs show that the head of a 212 g ...
Physics - Suppose that high-speed stroboscopic photographs show that the 200-g ...
Physics - Suppose that high-speed stroboscopic photographs show that the 200-g ...
physiscs - A model rocket is launched straight upward with an initial speed of ...
physics - A car traveling initially at 9.52 m/s acceler- ates at the rate of 0....

For Further Reading

First Name:
School Subject:
Answer: