Sunday
September 21, 2014

Homework Help: physics

Posted by Tammy on Wednesday, October 24, 2007 at 5:05pm.

A 5kg object moves to the right with a speed of 2m/s. It collides in a perfectly elastic collision with a 2 kg object moving to the left at 5m/s.What is the total kinetic energy after the collision?

In elastic collisions KE is conserved so KE_i =KE_f
KE_f=1/2(5)(2)^2+ 1/2(2)(5)^2
=10+25
=35 J
Is this correct?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - An object of mass 13 kg going to the right with a speed of 9m/s ...
Physics - A perfectly (non-head on) elastic collision occurs between a 0.25kg ...
Physics - A 26.0 g object moving to the right at 17.0 cm/s overtakes and ...
Physics - A 5.00 g object moving to the right at +20.0 cm/s makes an elastic ...
Physics - 1. Will the swinging wonder ever let 2 ball bearings go in and one ...
Physics - 1. Will the swinging wonder ever let 2 ball bearings go in and one ...
Physics - A 10.0 g object moving to the right at 19.0 cm/s makes an elastic head...
physics - a 10.0-g object moving to the right at 20.0 cm/s makes a elastic head-...
physics - A 10g object moving to the right at 20cm/s makes an elastic head-on ...
physics - A 0.500 ice puck, moving east with a speed of 6.70 , has a head-on ...

Search
Members