A man throws a rock at an angle of 45◦ to the horizontal at an initial speed of 25√ 2 ft/s. It leaves his hand 20 ft above the ground. There is a 7 ft tall board 50 ft away. (a) Where is the rock 1 seconds later? (b) How high does the rock go? (c) Does the rock hit the board?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?