Judge each spinning claim

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Angular momentum is conserved when the net external torque is zero.

2. Statement is true

   Yes

   Statement

   Pulling her arms in raises a skater's rate of spin.

3. Statement is true

   No

   Statement

   Angular momentum is a scalar with no direction in space.

4. Statement is true

   No

   Statement

   Rotational kinetic energy is a vector quantity.

5. Statement is true

   Yes

   Statement

   Torque equals the rate of change of angular momentum.

6. Statement is true

   No

   Statement

   Angular momentum and linear momentum share the same units.

7. Statement is true

   Yes

   Statement

   A gyroscope precesses because its torque stays perpendicular to L.

Instructions

Tap true or false for each claim about spinning bodies.

Explanation