Register to reply

Hockey puck momentum, conservation of linear momentum

by jehan4141
Tags: conservation, hockey, linear, momentum, puck
Share this thread:
Oct14-11, 08:20 PM
P: 91
Click image for larger version

Name:	ch07p_30.gif
Views:	7
Size:	16.2 KB
ID:	40001

The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.0480 kg and is moving along the x axis with a velocity of +7.76 m/s. It makes a collision with puck B, which has a mass of 0.0960 kg and is initially at rest. The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find the speed of (a) puck A and (b) puck B.

There are no answers provided. Could someone please tell me if my answers are correct?

Momentum in the y direction
Piy = Pfy
0 = MaVasin65 + -MbVbsin37
MaVasin65 = MbVbsin37
Va = MbVbsin37 / Ma*sin65
Va = (0.096sin37Vb) / (0.048sin65)

Pix = Pfx
0.048(7.76) = 0.048cos65Va + 0.096cos37Vb

Plug Va in and you get Vb = 3.595 m/s and thus Va = 4.77 m/s ?
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
Oct15-11, 08:46 AM
P: 950

Register to reply

Related Discussions
Conservation of momentum in combination of angular and linear momentum General Physics 16
Hockey puck momentum/ collision Introductory Physics Homework 1
Question about momentum involving shooting a hockey puck General Physics 1
Hockey Puck (Momentum) Introductory Physics Homework 1
Hockey puck momentum problem Introductory Physics Homework 5