1-3 with work on soeperate sheet of paper please

Lab 7: Pre-Lab Questions (21 pts.) Impulse for P1 10 1. A lab student applies a force to an air puck equal to that shown in the figure at the right. If the mass of the puck is m = 3.5 kg and its initial ve- F(N) locity is vi = 0m/s, find the puck's final velocity. (Hint: you can assume there is no friction acting on the puck) (5 pts.) 9 10 11 2. One day, you are driving your car down the highway, and you notice that you are driving well over the speed limit. You apply the brakes of the car, applying a variable stopping force, until the car slows down to a rea- sonable speed of 22.4 m/s (50 mph). A computer plots the force versus time for the vehicle and then measures the area under the curve. It is found that the area is -18,950 N.s. The total breaking time was 5.4 s. Given that the combined mass of you and your car is m = 1200 kg, how fast were you moving before applying the breaks? What is the average force applied by the road to the car during breaking? (Note: 1 N.s = 1 kg.m/s) (8 pts.) 3. A car of mass M traveling at velocity v1 i (to the right) strikes a wall and bounces back with velocity -v1 i What is the impulse on the car? An identical car traveling at a velocity v1 @ strikes the wall and does not bounce back. How does the impulse of this collision compare to the first collision? Assuming the crashes take approximately the same amount of time, how does the average force experienced by the driver in the collision with the bounce compare to that experienced by the driver in the car without the bounce? Is it safer to have fenders that bounce or fenders that buckle and bend? Which would you rather have on your car? (8 pts.) 72