Momentum+example

Problem 1 Black Board enters a section of the "cave of mystery". The section is 50m high, and any object in the cave does not feel the force of gravity. Without a rope or any climbing equipment, Black Board, knowing his physics, fires his musket down which floats him up. If Black Board's mass is 85kg, and the musket ball's mass is 0.5kg with a velocity of 120 m/s, how long will it take for Black Board reach the top of "cave of mystery"?

__Black Board's mass__ : 85kg __Height of section__ : 50m __Musket bullet's mass__ : 0.5kg __Velocity of Musket's bullet__ : 125m/s

50=0+(125m/s)(t)+1/2(0)t² 50=125(t)
 * 2.25=t**

mgh= 0=(.5)(-125m/s)+(85kg)v 0=-62.5+85v 62.5/85=85v/85
 * .735m/s**

y=y0t+vot+1/2at² 50=.735t
 * 68.25s

//Kevin N, Steven, Drew//** Change 0 of 0 [|<< First] [|< Previous] [|Next >] [|Last >>]

Black Board Adventure

~Zack Boldbaatar~