1. a golf ball has more mass than a tennis ball because
a. takes up more space| b. contains more matter|c. contains different kind of matter|d. has definite composition

What are two different ways you could find the value of a? explain these methods.

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.