1. A ladybug sits at the outer edge of a merry-go-round, and a grasshopper sits halfway between her and the axis of rotation. The merry-go-round makes a complete revolution once each second. The grasshopper’s angular speed is:

Select one:

a. Half the ladybug's angular speed.

b. The same as the ladybug's angular speed.

c. Twice the ladybug's angular speed.

d. Impossible to determine.

2. You are heading West in the car when traffic lights force you to stop. Determine the direction of the angular acceleration, angular velocity, and angular displacement vectors. For example angular acceleration North, Angular velocity South and angular displacement South would be NSS.

Select one:

a. SNN

b. EWW,

c. WEE

d. NSN

e. NSS

3. The figure shows a pair of force and radius vectors and four torque vectors.  Which of the numbered torque vectors goes with the force and radius vectors?

Select one:

a. τ₁

b. τ₂

c. τ₃

d. τ₄

4. Watch this video (http://www.youtube.com/watch?feature=player_embedded&v=B432iLNXkQ8). Now suppose you push horizontally at right angles to the shaft of a spinning gyroscope as shown in the figure.  Which way will the shaft move?

Select one:

a. The shaft will move upward.

b. The shaft will move downward.

c. The shaft will move in the direction it is pushed.

d. The shaft will move in the direction opposite to which it is pushed.

5. Consider the dumbbell in the figure.  How would its rotational inertia change if the rotation axis were at the center of the rod?

Select one:

a. It would increase

b. It would decrease.

c. It would state the same.

d. It cannot be determined with the information given.

6. The figure shows two identical masses m connected by a string that passes over a frictionless pulley whose mass is not negligible.  One mass rests on a frictionless table while the other hangs vertically, as shown.  Compare the force of tension in the horizontal and vertical sections of the string.

Select one:

a. The tension in the horizontal section is greater.

b. The tension in the vertical section is greater.

c. The tension in both sections is equal.

d. It cannot be determined with the given information.

7. A hollow ball and a solid ball roll without slipping down an inclined plane.  Which ball reaches the bottom of the incline first?

Select one:

a. The solid ball reaches the bottom first.

b. The hollow ball reaches the bottom first.

c. The balls reach the bottom at the same time.

d. It cannot be determined with the given information.

Answer rating: 100% (QA)

1 b same as the ladybugs angular speed Both insects have an angular speed of 1 revs which is the sam... View the full answer