Period 2Question 1

The total kinetic energy of a baseball thrown with a spinning motion is a function of:

1. its linear speed but not rotational speed

2. its rotational speed but not linear speed.

3. both linear and rotational speeds.

4. neither linear nor rotational speed.

Period 2Question 2

The pressure at the bottom of a glass filled with water (ρ = 1 000 kg/m3) is P. The water is poured out and the glass is filled with ethyl alcohol (ρ = 806 kg/m3). The pressure at the bottom of the glass is now:

1). smaller than P 2) equal to P 3) larger than P 4) indeterminate.

Period 3Question 1

A figure skater with arms initially extended starts spinning on the ice at 3 rad/s. She then pulls her arms in close to her body. Which of the following results?

1. a smaller rotational rate 2. a greater rotational rate3. a greater angular momentum4. a smaller angular momentum

Period 3 Question 2

Blood pressure is normally measured with the cuff of the sphygmomanometer around the arm. Suppose that the blood pressure is measured with the cuff around the calf of the leg of a standing person. Would the reading of the blood pressure be:

1) the same for the calf as it is for the arm? 2) greater than it is for the arm 3) less than it is for the arm 4) not enough information given