2 A kid throws a pencil straight up at
6.33 m/s. How much time does it
take for the pencil to reach
the ceiling, 1.25 m above?
(Unit = s)
Watch your minus signs!

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical