A 50 kg bobsled slides down an ice track starting (at zero initial speed) from the top of
a(n) 173 m high hill.
The acceleration of gravity is 9.8 m/s^2.
Neglect friction and air resistance and determine the bobsled’s speed at the bottom of
the hill.
Answer in units of m/s.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Which of the following is an example of motion in two dimensions?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e