Question

A 40 kg skater is skating on frictionless ice at 20m/s and crashes into a 350 kg bear on the same ice. As a result the skater is now moving at 5 m/s. What will you see if you watch the bear, will it be moving? How fast? Use math to explain

Answer 1

Answer: 0.01143 m/s

Step-by-step explanation:

use conservation of momentum, since momentum is always conserved. assume left of = is initial, to the right if final

m1v1=m1v1 + m2v2

(40)(20)=(40)(5) + (350)(v2)

solve for v2 (denoting velocity of bear)

yes, the bear will be moving, at a speed of 0.011428571 (round how you like)