2. Two masses are suspended by a string over the pulley in an Atwood's machine. One mass is 200 grams; the other is 100 grams. Ignoring friction and pulley moment of inertica, what is the acceleration of the heavier mass? a.) 0 m/s2

b.) 3.26 m/s2

c.) 6.52 m/s2

d.) 9.8 m/s2

e.) 14.7 m/s2

3. Which of the following pairs of masses would have the slowest acceleration on the Atwood's machine?

a.) 100 grams and 95 grams

b.) 100 grams and 50 grams

c.) 100 grams and 5 grams

d.) 100 grams and 0 grams

e.) 0 grams and 5 grams

4. You measure the acceleration of two masses attached to a string threaded over a pulley at 4.9 m/s2. Which of the following must be the value of the two masses?

a.) 0 grams and 300 grams

b.) 50 grams and 300 grams

c.) 100 grams and 300 grams

d.) 150 grams and 300 grams

5. You notice that the pulley being used in the lab has noticeable friction. What effect does this friction have on the acceleration of the masses?

a.) Friction makes the masses accelerate more slowly.

b.) Friction makes the masses accelerate more quickly.

c.) Pulley friction has no effect.

d,) The friction causes the masses to not move at all.

6. Two masses of 50 grams and 150 grams are set up on an Atwood's machine. The measured acceleration is 4.5 m/s2. How much force is friction exerting on the heavier mass?

a.) 45 N

b.) 0.45 N

c.) 0.040 N

d.) 0.060 N

7. Imagine a Atwood's machine with a "massive" string without weights attached. The experiments here used a light string, whose mass (compared to that of the weights) you ignored. Suppose that you moved the string so that unequal lengths were on each side of the pulley. What type of motion will you see when the string is released?

a.) no motion

b.) constant speed

c.) constant acceleration

d.) increasing acceleration

8. If the pulley is quite massive, how will your results be affected?

a.) faster acceleration due to flywheel effect

b.) slower acceleration due to inertia

c.) no acceleration (constant) speed due to moment of inertia

d.) acceleration slows and then stops at terminal speed