Gravitational Fields

Today in class we went over the Falling and Air Resistance sheets that we were given yesterday.

Here are the answers to the Bronco skydives sheet:

Circle the correct answers.

1) Most

2) a,b

3) d,e

4) still downwards

5) c,f

6) c,f

7) c

8) greater

a) a= 10 m/s²=

b) a= 6 m/s²

c) a = 0 m/s²

d) a = -2 m/s²

e) a = -10 m/s²

f) a = 0 m/s²

Here are the answers to the second sheet we were given. It's the sheet with the 7 problems.

1) Air resistance is equal to weight.

2) Air resistance to weight ratio is less for the skydiver.
Increase the surface area to make both terminal speeds equal.

3) Fnet = 25 N
Fnet = 10 N [ down ]
Fnet = 0 N

4) 100 N

5) As a skydiver falls faster and faster through the air, the net force decreases.
Acceleration decreases.
Reason: As she is falling through the air, there is an increase in air resistance.

6) She gains more speed in the first second of fall.
She gains more distance in the ninth second of fall.

7) We used the following free body diagram to answer this question.

After correcting the sheets we were given a hand out on Static Friction. We went over this hand out and were given out two review packages. If you weren't here today you should go see Ms. Kozoriz to get these sheets.

That was basically it for today's class.