Posted by **Joeline** on Wednesday, May 22, 2013 at 10:06pm.

A hand gun fires a 12.0 g bullet at a speed of 400 m/s.

What is its kinetic energy?

At what speed must a motorcycle of mass 173 kg move to have the same kinetic energy as the bullet? Express your answer in km/h.

- Physics !!!!! HELP PLEASE -
**drwls**, Thursday, May 23, 2013 at 8:02am
K.E. is (1/2) M V^2

To get it in Joules, M must be in kg.

bullet KE = 960 Joules

If motorcycle KE = 960 J,and its mass is 173 kg,

(1/2)*173*Vm^2 = 960

then the motorcycle velocity is

Vm = 3.33 m/s

Convert that to km/h

## Answer This Question

## Related Questions

- Physics - A pitcher claims he can throw a 0.157 kg baseball with as much ...
- Algebra II - The kinetic energy of a moving body is directly proportional to ...
- Algebra II - The kinetic energy of a moving body is directly proportional to its...
- Algebra II - The kinetic energy of a moving body is directly proportional to its...
- Math - the kinetic energy of moving body ids directly praportional to its mass ...
- physics - A gun is fired vertically into a 1.55 kg block of wood at rest ...
- physics - a gun converts 200J of stored energy into kinetic energy of the 0.02kg...
- physics - a gun converts 200J of stored energy into kinetic energy of the 0....
- Physics - A gun converts 200J of stored energy into kinetic energy of the 0.02kg...
- physics - A 30-caliber rifle with a mass of 2.80 kg fires a 9.84- g bullet with ...

More Related Questions