In Figure 4.40, a person skis down a 20 m long snow slope which makes an angle of 25° with the horizontal
The total mass of the skier and skis is 50 kg. A constant
frictional force of 60 N opposes the skier's motion. The
speed of the skier descending from the top of the slope
is 2.5 ms.
a) Calculate the magnitude of the net force parallel
to the slope experienced by the skier.
b) Use the work-energy theorem to calculate the
maximum speed of the skier at the bottom of the
20 m long slope.
monline​

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.