a bobsled zips down an ice track, starting from rest at the top of a hill with a vertical height of 150m. disregarding friction, what is the velocity of the bobsled at the bottom of the hill? (g=9.81 m/s^2)

54.2 m/s

Explanation:

We can solve the problem by using the law of conservation of energy. The total mechanical energy at the top of the hill is just gravitational potential energy:

where m is the mass of the bobsled, g is the gravitational acceleration and h=150 m. The total mechanical energy at the bottom of the hill is just kinetic energy:

where v is the velocity of the bobsled at the bottom of the hill. Since the total energy must be conserved, we can write:

and we can solve for v