A skier is traveling fast down a mountain slope. The table shows data collected on the skier at a particular instant.
Mass
64 kg
Weight
608 N
Velocity
21 m/s, forward
Force of skier pushing forward
45 N, forward
Which data are needed to determine the reaction force of the snow pushing
on the skier?
O A. The pushing force and the skier's mass
B. The skier's mass and velocity
C. The skier's weight and acceleration
D. The force of the skier pushing forward

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?