Which of the following will increase the ANGULAR MOMENTUM of a person spinning on a rotatable frictionless bar chair?

Q-1: Which of the following will increase the ANGULAR MOMENTUM of a person spinning on a rotatable frictionless bar chair?

1) moving the arms closer to the body
2) moving the arms farther from the body
3) moving one arm farther from the body and the other arm closer to the body with spastic repetition
4) none of these
ANSWER: 4 -- NONE OF THESE

Q-2: What is the relationship between the frequency and the period of a wave?

ANSWER: THEY ARE INVERSES OF EACH OTHER

Q-3: For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the:

1) Lyman series
2) Paschen series
3) Balmer series
4) Pfund series
ANSWER: 3 -- BALMER SERIES

Q-4:  The unit of mass in the English system of measure is which of the following?

1) pound
2) gram
3) slug
4) dyne
ANSWER: Y -- SLUG

Q-5: What law asserts that it makes no difference in what grouping we add vectors?

ANSWER: ASSOCIATIVE LAW OF VECTOR ADDITION

Q-6:  A ball is thrown vertically upwards from the ground with a speed of 80 feet/second. In the English system of units, what is the magnitude and direction of the acceleration of the ball?

ANSWER: 32 FEET PER SECOND SQUARED DOWN or TOWARDS THE
EARTH

Q-7: A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, what impulse did the ball receive?

ANSWER: 3 NEWTON-SECONDS

Q-8: A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the left of vertical. Which of the following answers could explain this phenomena?

1) The railroad car is at rest.
2) The railroad car is accelerating to the left.
3) The railroad car is moving with constant velocity to the right.
4) The railroad car is accelerating to the right.
ANSWER: 4 -- THE RAILROAD CAR IS ACCELERATING TO THE RIGHT.

Q-9: At time t=0, a body has a velocity of 5 meters per second, EASTWARD; at time t=2 seconds, its velocity is 7 meters per second WESTWARD. What is the MAGNITUDE of the body's average acceleration?

ANSWER: 6 METERS PER SECOND SQUARED

Q-10:  A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons, what is the magnitude of the northward acceleration of the box?

ANSWER: 0.4 METERS PER SECOND SQUARED