Recent content by Johnson1704

yep i had to redo my work. i think i did 44kg for jill on accident or something like that When do you use momentum vs energy conservation laws? Collisions seem to use both. Does the type of collision effect which law to use? if it is totally inelastic can you use conservation of energy?

conservation of momentum. I found another website explaining. i think I am going to get it. ill update. but I am going to use that law because jack passes off some momentum to jill. DO FOR X AND Y DIRECTIONS: m_jack*v_jack_i + m_jill*v_jill_i = m_jack*v_jack_f + m_jill*v_jill_f so far i got...

Homework Statement Jack (mass 59.0 kg ) is sliding due east with speed 8.00 m/s on the surface of a frozen pond. He collides with Jill (mass 46.0 kg ), who is initially at rest. After the collision, Jack is traveling at 5.00 m/s in a direction 34.0∘ north of east. Ignore friction. Homework...

I figured it out about 30 mins after I posted and deleted the attachment and was going to delete the post but couldn't figure it out. Thanks though!

please brahs, it's been a solid 2 hours I've been on this problem

bump

Homework Statement You are lowering two boxes, one on top of the other, down the ramp shown in the figure (Figure 1) by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 19.0 cm/s . The coefficient of kinetic friction between the ramp and the...