# Lab 2 Rubric (Online-Only) UTK PHYS 221 Breinig Fall 2021

```Lab 2: Newton’s Laws - Online-Only (90 points)
Goal (5 points)
Initial Discussions (10 points):
Question 1 (5 points): Discuss with your partners what you think happens to the
head of a buckled-up driver when the car is hit from behind.
Question 2 (5 points): Discuss what you think happens to the head of a buckled-up
passenger in a moving car when the car hits a stopped car.
Experiment 1 (25 points):
Record what happens to the ball when you conduct the following three experiments.
Question 3 (5 points): Are your observations consistent with Newton's first
law? Discuss!
Question 4 (5 points): Using Newton's First Law, predict what should happen to the
head of the buckled-up driver in the stopped car.
Question 5 (5 points): Where should the brain trauma occur in this type of accident?
Question 6 (5 points): Using Newton's First Law, predict what should happen to the
head of the buckled-up passenger in the moving car.
Question 7 (5 points): Where should the brain trauma occur in this type of accident?
Experiment 2 (25 points):
Question 8 (5 points): Refer to your graph and describe the relationship between
force and acceleration using words.
Question 9 (5 points): What is the statistical uncertainty in your slope?
Question 10 (5 points): What is the physical meaning of the slope?
Question 11 (5 points): Write down Newton's 2nd law in the form of an
equation. Define any variables and/or constants.
Question 12 (5 points): What is your best estimate for the mass of the cart and the
sensors in the video clips?
Newton’s 3rd Law Video (25 points):
a)
Question 13 (5 points): Compare the magnitude and direction of these forces
experienced by the two carts during the collision.
b)
Question 14 (5 points): Again read the forces acting on both carts from the graph
and compare the magnitude and direction of these forces.
c)
Question 15 (5 points): What changes and what stays the same when the carts are
pushed harder?
d)
Question 16 (5 points): What changes and what stays the same when the mass of
cart A is doubled?
e)
Question 17 (5 points): Do these force versus time graphs help you understand
Newton's third law?
```