1-Force is defined as...

a-Joules/second

b-Force x distance

c-mass x acceleration

d-Nerdy Jedi thing

2-Newtons First Law of Motion is usually called the "Law of ____"

a-Gravity

b-Least Squares

c-Inertia

3-A 120 kg quarterback is stationary in the "pocket" and hit by a defensive tackle with 4000 Newtons of force. What acceleration did the quarterback experience after being hit?

4-In engineering and physics we talk of "g-forces". Where 1 G = 9.8 m/s^2 (the acceleration due to gravity). Sometimes they are referred to in what I call "science slang" as "G-forces" or just "G's". G's actually is physically correct because we know there is no force unless you multiply by the mass. The quarterback in Q3 experienced how many "G's"?

5-The next three questions are going to be phun, damn it! Just relax and think about what you have learned. I raise the rock to two meters off the ground. But at this moment I am just holding it. Now, I drop the rock. This 3.2 kg (mass) accelerates (a) downward at 9.8 m/s^2. I have a mass. I have an acceleration. What is the magnitude of the force on the rock exerted by the Earth? (I used the word "magnitude" which means give a positive number answer)

6-The 3.2 kg rock plummets to the Earth. It displaced (change in distance) in the negative direction. The force acting on it (gravity) was in the negative direction. Did gravity do positive or negative work?

a-Positive

b-Negative

7-How much work did the force of gravity do on my 3.2 kg rock when I dropped it from 2.0 m?

https://www.youtube.com/watch?v=8_RfK2rp2To

Before going any further watch this video of pole vaulting champion Yelana Isbinbayeva: This is from IAAF World Athletics Tour, Herculis, Womens Pole Vault, Yelena Isinbayeva, of Russia, sets yet another world record at 5.04 meters. In the midst of having a tough day, she pulled through and broke her old record on her last try. Video courtesy of Universal Sports at Universal Sports.com licensed through Creative Commons.

8-Yelana soared to 5.04 meters that day. For us Americans, how many feet is that?

9-Doing a quick internet search, I discovered Yelana has a mass of 65 kg. How much work did the pole do to lift her to this height? (The pole did the work.) Don't forget about the acceleration of gravity!

10-The best that I could determine by doing the video in slo-mo world record jump is that she was in the air to the maximum height for 1.9 seconds.Based on your previous answer, how much "power" (in Watts) did the pole generate to lift him to that height?

11-Convert your previous answer to horsepower.

https://www.youtube.com/watch?v=W9L3bllEbm4

12-Based on the calculations you did in the Chapter 2 Quiz , where you determined the force on the dragster was 24340 Newtons and the distance it traveled was 259 meters, what was the work done by the static frictional force to push the dragster that far? (For you physics profs and teachers who may wonder about my numbers. I assumed an average acceleration and a time of 4.38 seconds. You could also assume an average acceleration and take the average speed times the time.)

13-Staying with the dragster problem...two more... If the dragster did the amount of work you calculated in the previous problem in 4.38 seconds, how much power was generated in Watts?

14-Convert your answer in the previous problem to horsepower.