Question1
A small, plastic sphere of mass m = 137 g is attached to a string.
There is an electric field of 174 N/C directed along the + x axis. If string makes an angle 33 degrees with the y axis when the sphere is in equilibrium, what is charge on sphere?
Question2
The speed of a basketball as it is dribbled is similar while the ball is going towards the floor as it is when the ball rises from the floor. Is the basketball's change in momentum equivalent to zero when it hits the floor? If not, in which direction is the alteration in momentum? Illustrate a basketball's momentum vectors before and after it hits the floor.
Question3
Small light bulb suspended at distance y2 = 2.50 m above surface of the water in a swimming pool where water depth is y1 = 2.00 m. The bottom of the pool is a large mirror. How far below mirror surface is the image of the bulb?