Physics 6A Practice Midterm1

# Physics 6A Practice Midterm1 - Physics 6A Practice...

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www.clas.ucsb.edu/staff/vince Physics 6A Practice Midterm #1 1. You drive your car at a speed of 40 km/hr for 1 hour, then slow down to 30 km/hr for the next 20 km. How far did you drive, and what was your average speed? a) 60 km at 35 km/hr b) 60 km at 36 km/hr c) 65 km at 38 km/hr d) 70 km at 36 km/hr 2. A speeding car is traveling at 40 m/s down a straight road. The driver slams on the brakes, and the car comes to a complete stop in 5 seconds. Assuming constant acceleration, how far did the car travel while braking? a) 50 m b) 80 m c) 100 m d) 200 m 3. A rock is thrown upward from the top of a 300-meter high cliff. The initial speed is 10 m/s. If we ignore air resistance, how long does it take for the rock to hit the ground below? a) 7.8 s b) 8.9 s c) 9.8 s d) 12.2 s 4. Two rocks are thrown with the same initial speed from the top of a 300-meter high cliff. Rock A is thrown upward and Rock B is thrown downward. If we ignore air resistance, which of the following is true about the speeds of the rocks just before they hit the ground? a)

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## This note was uploaded on 09/09/2011 for the course PHYS 6a taught by Professor Stanek during the Spring '07 term at UCSB.

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Physics 6A Practice Midterm1 - Physics 6A Practice...

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