Recent content by PhunWithPhysics

how is it more complicated? There is no momentum at the start so initial momentum is 0. So how do I solve for the masses if there are no mases?

Two ice skaters masses M1 and M2 push off against each other and move in opposite directions with different speeds. As they glide to a halt their magnitudes of their accelerations are equal and skater M1 glides TWICE as far as skater M2. What is the ratio of M1/M2 of their masses. Is it just...

just forget it I can't figure it out so just don't worry about it any more

I had worked on that too? Is h = h,final - h,intial, or the other way, V = the square root of 2 times 9.8 times h , but what can I do with velocity to get the impulse to be 4.28 because I keep coming up with 3.7 something what am I doing wrong. What else am I missing. I know the answer is 4.28...

Need a little more? I had already been toying with the acceleration as 9.8 which is m/s^2. So that times the mass will give me (Kg) times m/s^2 which equals Newtons then I just need to find time. Or am I going about this all wrong. Can you explain what equation I should be using. Or how to...

no acceleration I was not given the acceleration though. Just Height final, height initial and mass?

still don't understand If i use kinematics of a falling object they all use time or velocity and energy measurements use velocity too don't they? I need help.

confused How can I find velocity if all I have is hieght? Don't I need time to find velocity? I know that the answer is 4.28 , I just don't under stand what equation I need to use? still confused.

still confused how can I find impulse (J) which equals average force X change in time. when I need velocity to find the change in momentum?

I have a ball that is dropped from from rest at a height of 1.2 meters it hits the ground and bounces to a height of 0.7 meters. The mass of the ball is 0.5kg. I am assuming that initial velocity is 0 because it is released from rest. I need to find the magnitude of direction of the impulse of...

I have a 300 kg piano being lifted at a steady speed from the ground to a hieght of 10 meters and the crane that is doing the lifting is providing 400 watts of power. How much time does it take to get the piano to the top. So far I have Power = work/Time so time is Work/ power , so, work is...

I have a 300 kg piano being lifted at a steady speed from the ground to a hieght of 10 meters and the crane that is doing the lifting is providing 400 watts of power. How much time does it take to get the piano to the top. So far I have Power = work/Time so time is Work/ power , so, work is...

please help I know I need to apply Newtons 2nd law to the boxes but how do i do that?

It just says the (weight) of the block on the table is 422 (N)ewtons

Block sitting on table is 442 N , there is a pulley at the end of table with another 185 N box hanging from a rope that goes through the pulley and attaches to the first box on table. The pulley is massless , I need help finding the acceleration , and the tension...It says ignore all frictional...