Q-1: Of the following answers, which is the frequency closest to middle-C on a piano?

1) 20Q-2: The non-relativistic mass of an object

2) 256

3) 2520

4) 25200ANSWER: 2 -- 256

1) must be the same as its weightQ-3:A ball is thrown horizontally from the top of a cliff. Assuming no air resistance, the acceleration of the ball while it is in flight is:

2) depends on where you measure it

3) does not change with increasing velocity

4) is greatest at the polesANSWER: 3 -- DOES NOT CHANGE WITH INCREASING VELOCITY

1) in the vertical direction onlyQ-4:While traveling in a straight line, a car uniformly changes its speed from 50 kilometers per hour to 110 kilometers per hour in 5 seconds. The acceleration of the car during this time is:

2) in the horizontal direction only

3) in the vertical and horizontal directions

4) zero.ANSWER: 1 -- IN THE VERTICAL DIRECTION ONLY

1) 5 kilometers per hour per secondQ-5: If there is to be a change in velocity, there MUST be a change in

2) 12 kilometers per hour per second

3) 50 kilometers per hour per second

4) 60 kilometers per hour per secondANSWER: 2 -- 12 KILOMETERS PER HOUR PER SECOND

1) speed onlyQ-6: Susan pushes against a 100 kilogram rock with a force of 5 Newtons, but the rock doesn't move. The force the rock exerts on Susan is

2) direction only

3) either speed or direction

4) both speed and directionANSWER: 3 -- EITHER SPEED OR DIRECTION

1) 0 Newtons

2) 5 Newtons

3) 20 Newtons

4) 100 NewtonsANSWER: 2 -- 5 NEWTONS