Physics: One mass collides w/ another, initially at rest....

[staceyrho]

Question: A 468 kg mass is sliding on a horizontal frictionless surface with a speed of 9.3 m/s when it collides with a 82 kg mass initially at rest. The masses stick together and slide up a frictionless track at 60 degrees from horisontal. The acceleration of gravity is 9.8 m/s^2.

1) What is the speed of the two blocks?

I figured out the speed of the two blocks: 7.91345 m/s

2) To what maximum height h above the horizontal surface with the masses slide? Answer in units of m.

 

[skeeter]

Re: Physics: One mass collides w/ another, initially at rest

Question: A 468 kg mass is sliding on a horizontal frictionless surface with a speed of 9.3 m/s when it collides with a 82 kg mass initially at rest. The masses stick together and slide up a frictionless track at 60 degrees from horisontal. The acceleration of gravity is 9.8 m/s^2.

1) What is the speed of the two blocks?

I figured out the speed of the two blocks: 7.91345 m/s

correct

2) To what maximum height h above the horizontal surface with the masses slide? Answer in units of m.

use energy principles ... solve for h.
mgh = (1/2)mv²