PHYSICS 1403 Quiz 7, February 22, 2008
This should be TRIVAL, if you were in class this week &/or if you’ve read Ch. 5! Please write NEATLY &
LARGE ENOUGH for me to read! Thanks. (Use back if necessary. Please tell me you’ve done so!)
Name: ______________________
1.
One topic in Ch. 5 is application of Newton’s Laws to objects moving in a circle of
constant radius r at constant speed v. See figure to the right 
One of the first things discussed is that such an object experiences an acceleration a.
a. (4 points) What is the DIRECTION of the acceleration vector a for such an object?
Sketch this vector on the figure.
m
r
m
Fill in the blanks in parts b & c.
b. (4 points) The acceleration mentioned above is usually called the
_________________ acceleration.
c.
v
v
(4 points) Since there is an acceleration, Newton’s 2nd Law tells us that there must be a net force
ΣF = ma acting on the mass. This force is usually called the _________________ force.
2.
(4 points) A mass m is moving at constant speed v = 5 m/s in a circle of radius r = 0.2 m. Calculate the
acceleration a it experiences.
3.
(4 points) In addition to the topic of Question 1, there is a second main topic in Ch. 5. What is it?
PHYSICS 1403 Quiz 7, February 22, 2008
This should be TRIVAL, if you were in class this week &/or if you’ve read Ch. 5! Please write NEATLY &
LARGE ENOUGH for me to read! Thanks. (Use back if necessary. Please tell me you’ve done so!)
Name: ______________________
1.
One topic in Ch. 5 is application of Newton’s Laws to objects moving in a circle of
constant radius r at constant speed v. See figure to the right 
One of the first things discussed is that such an object experiences an acceleration a.
a. (4 points) What is the DIRECTION of the acceleration vector a for such an object?
Sketch this vector on the figure.
m
r
Fill in the blanks in parts b & c.
b. (4 points) The acceleration mentioned above is usually called the _________________
acceleration.
c.
v
(4 points) Since there is an acceleration, Newton’s 2nd Law tells us that there must be a net force
ΣF = ma acting on the mass. This force is usually called the _________________ force.
2.
(4 points) A mass m is moving at constant speed v = 5 m/s in a circle of radius r = 0.2 m. Calculate the
acceleration a it experiences.
3.
(4 points) In addition to the topic of Question 1, there is a second main topic in Ch. 5. What is it?
m
v