A 50 kg object traveling at 100 m/s collides (perfectly elastic) with a 50 kg object initially at rest. What is the sum of the momentum of both objects prior to the collision?

a. 100 kgm/s b. 500 kgm/s C. 5,000 kgm/s d. 100,000 kgm/s​

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?