Author Question: A 0.330-kg volleyball is thrown vertically downward with a speed of 0.150 m/s in a place where g = ... (Read 140 times)

moongchi · **on:** Jul 29, 2018

A 0.330-kg volleyball is thrown vertically downward with a speed of 0.150 m/s in a place where g = 9.81 m/s2. It takes it 0.0655 s to reach the ground. What is the magnitude of its momentum just before it hits the ground?

A) 0.212 kg m/s
B) 0.262 kg m/s
C) 0.163 kg m/s
D) 0.0216 kg m/s
E) 0.0418 kg m/s

Question 2

Starting from very far away, an object is moved closer and closer to a convex lens, eventually reaching the lens. What happens to its image formed by that lens? (There could be more than one correct choice.)

A) The image gets closer and closer to the lens.
B) The image gets farther and farther from the lens.
C) The image eventually changes from virtual to real.
D) The image eventually changes from real to virtual.
E) The image keeps getting larger and larger.