Witch of the following object is not a practical example of gravity acting on a moving object?
a. rain falls from the sky
b. a car speeds up as a traffic light turns green
c. a leaf falls from a tree and floats to the ground
d. a diver jumps off a diving board and splashes in to a pool below

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration