Question

(a) A half meter rod is pivoted at the center with two weights of 20gf and 12 gf suspended
at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown
below.
[3]
50 cm
20gf
12gf
6 cm
10 cm
Find the net moment about the center, if the 20gf force is put on the other side of pivot
find the resultant moment of the forces on the rod?​

Answer 1

Explanation:

Two hockey players are about to collide on the ice. One player has a mass of 66 kg and is traveling at 1.5 m/s north. The other has a mass of 75 kg and is

traveling at 1.2 m/s south. The system consists of the two tlockey players.

According to the law of conservation of momentum, what is the total

momentum of the system after they collide? Assume the collision is an

elastic collision.

A. 189 kg-m/s south

O B. 9 kg-m/s north

C. 189 kg. m/s north

D. 9 kg m/s south