Wednesday

October 22, 2014

October 22, 2014

Posted by **Leo** on Tuesday, March 15, 2011 at 1:03am.

2. A 32-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 205 J from 435 J. How high does she rise during this interval? Neglect air resistance.

- Physics -
**drwls**, Tuesday, March 15, 2011 at 7:06am1. 190,000 = (M/2)(29^2 - 21^2)

Solve for M in kg

2. K.E. loss = P.E. gain

(425 - 235) = M g H

Solve for H, the distance she rises during that interval.

(She will rise still farther until her kinetic energy is zero.)

**Answer this Question**

**Related Questions**

physics - It takes 228 kJ of work to accelerate a car from 22.3 m/s to 29.2 m/s...

physics - It takes 222 kJ of work to accelerate a car from 22.1 m/s to 29.9 m/s...

physics - It takes 175 kJ of work to accelerate a car from 23.9 m/s to 27.7 m/s...

physics - It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s...

physics - It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s...

Physics - It takes 180 kJ of work to accelerate a car from 21.0 m/s to 27.5 m/s...

College Physics - It takes 164 kJ of work to accelerate a car from 23.7 m/s to ...

Physics - In a performance test, each of two cars takes 9.4 s to accelerate ...

Physics - 9)A car, moving along a straight stretch of highway, begins to ...

physics - A car, moving along a straight stretch of highway, begins to ...