Question
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
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"
https://www.youtube.com/watch?v=W9L3bllEbm4
5-In the video it showed the dragster went from rest (speed of 0 mph) to 265 mph in 4.38 seconds. First, convert the 265 mph to meters/seconds.
6-Now, let's calculate the acceleration of the dragster. Remember, acceleration is the change in speed (final speed minus initial speed) divided by the change in time-4.38 seconds.
7-A typical top fuel dragster has a mass of 900 kg. What is the force applied to the dragster by the drive shaft, which turns the wheels, which then use the static friction of the strip to push the dragster down the road? F = ma (we will talk about that static frictional force later in the course).
8-With a dragster, unlike a human being we can safely assume, for the short amount of time in which we are doing our analysis--4.38 seconds--that the acceleration is constant. Knowing that the initial velocity was zero m/s, and the acceleration, how far did the dragster go in those 4.38 seconds?
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