You are speeding your 2000 kg truck down Ferguson on a Friday night at 28 m/s. You see a squirrel in the road and slam on the brakes to avoid hitting it. The brakes plus the road friction generate 5000 N of force on the car. How far will your car skid before it stops?
5 points
5
Question 2
2.
Do you hit the squirrel if it was 100m away from your original position? (yes or no)
10 points
10
Question 3
3.
If you were driving slower like a responsible teen,18 m/s, what is your new stopping distance?
5 points
5
Question 4
4.
How would a slower speed have changed the outcome?
15 points
15
Question 5
5.
Use your answers to 1, 2 and 3 to answer: Why is it a good idea to drive the speed limit according to Physics?
20 points
20
Question 6
6.
A bullet with a mass of 0.020 kg is fired from rest in a rifle with a barrel that is 0.65 m long. The force exerted by the expanding gas in the barrel is a constant 5500 N. Determine the speed that the bullet would have at the end of the barrel.
20 points
20
Question 7
7.
A 60 kg diver falls from the 4 meter platform at UT's swimming complex into the pool below. Calculate
the diver’s velocity at impact. (number only rounded to nearest tenth ex: 7.2)
10 points
10
Question 8
8.
Someone wearing skates on a horizontal surface is pushed by a friend with a constant force of 65 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 352 J?