Recent content by elissadi

Can anyone explain to me in simple terms about momentum and conservation of momentum. I understand the terms, but don't understand how it relates to a smaller object sliding sideways into a non-moving larger object. Before the smaller object hits the larger, doesn't it have a larger momentum...

yes, momentum is p=mv, which would give me the "t" for impulse = Ft which would give me the impulse?

If you know the mass of an object and the speed of its motion, how do you calculate how large the impulse is when it is caught or stopped?

What is the formula? What if I added, let's say, a max. height like 75 m. Could energy lost, like due to friction with the air on the way up be calculated?

If a 3 kg ball is thrown straight up at 40 m/s, using energy conservation, calculate how high the ball would go if there was no wind resistance. I was told this could not be calculated. Is that true? and if so, why?

Thank you all! I think all this advice will help greatly! I will work on this when I get back from class :)

so, I should divide 200/9.8m/s^2 to get the mass which would be 20 kgs. Or should I convert 200 lbs to kilograms first?

I have done most of the work on the problem written below, but the more I look at it, the more I am not sure whether I should leave the pounds as they are instead of converting them to kilograms. If I leave it as 200 lbs, are the number plug-ins going to be wrong? I am using the formula g...

Ok... Ok, thanks...I found the acceleration, now how does that fit into the rest of the situation?

I'm stuck! Please help! I have been looking @ this problem for 2 hours! :uhh: A 1200 kg car has a speed of 30 m/s - it runs out of gas and coasts, stopping in 40 secs. What is average force of friction on the car? Do you find the car's acceleration first? There is no force, so you...