Which 3 latitudes receive the sun at their zenith?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?