10 pts.) You are driving your car and speeding up when a truck hits you from beh

Question

10 pts.) You are driving your car and speeding up when a truck hits you from behind. (a) Draw all the forces acting on your car. (b) When the truck hits you from behind, your head jerks back (whiplash) even though your car is going forward. Explain why your head moves backwards. (8 pts.) You go bowling with some friends. You throw a bowling ball with a constant velocity of 11.5 m/s. If the ball takes 1.8 seconds to hit the pins, how long is the lane? pts.) A 2200 kg truck brakes (decelerates) at 3.25 m/s. What is the net force applied to the truck?

Explanation / Answer

8) distance = speed* time

d = v*t

= 11.5*1.8 = 20.7 m

9) force = mass * acceleration

F = ma = 2200*3.25

= 7150 N

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