In using a long steel rod as a lever to move a large rock, where should the fulcrum be placed for a person to use the least amount of force to move the rock?
A. Anywhere in between; it makes no difference
B. Close to the rock
C. Close to the person
D. Exactly halfway between the person and the rock
Answer: B
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The magnetic field inside a solenoid having 100 turns per cm at a current of 5.0 A is
a. 
b. 
c. 
d. 
e. 
The lower limit for a main sequence star is _______________ solar masses
Fill in the blank(s) with correct word
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The distance from the starting point is 16 m
a. True b. False Indicate whether the statement is true or false
An archer pulls her bow string back 0.40 m by exerting a force that increases uniformly from zero to 240 N. What is the equivalent spring constant of the bow, and how much work is done in pulling the bow?