PHYS 10111 Lecture 3: Notes on Practice Questions

How far from a lens of focal length 50 mm must the object beplacedif it is to form a virtual
image magnified in size by a factor of three?
A) 33 mm
B) 42 mm
C) 48 mm
D) 54 mm

A particle (m=50 g, q=5.0 uC) is released from rest when it is 50cm from a second particle (Q= -20 uC). Determine the magnitude ofthe initial acceleration of the 50-g particle.
a. 54 m/s^2
b.90 m/s^2
c.72 m/s^2
d.65 m/s^2
e. 36 m/s^2