A tennis ball is struck horizontally with an initial velocity of 20 m/s, and it hits the ground 1.5 seconds later. How far away does it land? From what initial height was the ball
struck?

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value