(m)(−v sin60°). Since the total vertical momentum after the collision is zero,
we find that
- B If the collision is elastic, then kinetic energy is conserved. Therefore
67. C Since we know g = 10 m/s^2 on the earth, the value of g on the moon
must be (10) = m/s^2. So, if an object weighs 20 N on the moon, its mass
must be
Since mass does not vary with location, if the mass is 12 kg on the
moon, it’s 12 kg here on Earth (and everywhere else).
- B The strength of the electric field at a point that is a distance r from a
point charge of magnitude Q is given by the expression. If the source
