Recent content by bob7

now i found the height to be .46 meters. the length of the cord is 1.5 meters. And I need to find the angle in between the initial position (from it just hanging) to the final position (when it is in the air). Now that creates a triangle, but I can't figure out how to get at that angle. Thanks...

Homework Statement A ball with a mass, m1=0.24 kg, initially moves to the right with a speed of 5m/s. The first ball then has an elastic collision with a second ball with a mass of .56kg which is initially at rest. The second ball is suspended just above the table by a cord which is 1.5 meters...

How would I include vectors in my answer to make it correct?

So the final answer is -18N. Thanks so much. Sorry that it took me so long to understand.

So if 18 is the magnitude of the average force between the two balls, how would I then calculate just the average force acting on ball 1?

Ok, the initial mementum of ball 2 is zero. its final momentum is .15*3=.45. Then divide that by time. .45/.025= 18. Would this be that average force that is acting on ball 1 that the problem is looking for? I also know the initial positions of the balls on an xy plane. Ball 1=(-30,0)cm. Ball...

so if I use the formula i get: ((.15*3)-(.15*10))/.025 which gives me 42. But I think this is wrong because of the vectors. I am really confused on how to do this problem with the vectors. Thanks.

Do I have to worry about vectors with that equation? What would the equation look like exactly? Thanks so much!

Homework Statement Three billiard balls are placed at rest on a level surface. Each ball has a mass of .15 Kilograms. If Ball 1 (m1) has an initial velocity of 10m/s towards ball 2 (m2), and after the glancing collision ball 1 (m1) moves 3m/s towards ball 3 (m3). Find the average force acting...