This exam consists of 25 questions; true-false questions are worth 2 points each, three-choice multiple choice questions are worth 3 points each, five-choice multiple choice questions are worth 6 points each. The maximum possible score is 110. When the exam was given, the mean was 77.9; the median was 80. Click here to see the formula sheet that came with the exam.

A car is moving in a straight line. The graph gives the velocity as a function of time.

How far does the car travel between t = 2 seconds and t = 5 seconds?

(a) 2 m (b) 6 m (c) 12 m (d) 18 m (e) 30 m

(a) 1 s (b) 3 s (c) 8 s

(a) greater than zero. (b) zero. (c) less than zero.

(a) 9.8 m (b) 19.6 m (c) 7.4 m (d) 12.6 m (e) 4.9 m

(a) 186 m/s (b) 196 m/s (c) 206 m/s (d) 1760 m/s (e) 2160 m/s

(a) 8 s (b) 5 s (c) 2 s (d) 10 s (e) 4 s

(a) Ball A. (b) Ball B. (c) They both spend the same time in the air.

You throw a ball upward with an initial speed of 10 m/s at an angle of 45° from the horizontal.

What is the speed of the ball at its maximum height?

(a) 0.0 m/s (b) 5 m/s (c) 6.67 m/s (d) 7.07 m/s (e) 10 m/s

(a) 5.10 m (b) 7.20 m (c) 10.2 m (d) 14.4 m (e) 15.1 m

(a) a greater distance (b) the same distance (c) a shorter distance

(a) east of north (b) due north (c) west of north

A block of mass M = 20 kg is at rest on a horizontal surfacIt is pulled to the right with a force F. The minimum value of force needed to get the block sliding is 150 N. What is the value of the coefficient of static friction between the block and the surface?

(a) 0.45 (b) 0.52 (c) 0.62 (d) 0.76 (e) 0.81

(a) 98 N (b) 196 N (c) 294 N (d) 490 N (e) 570 N

(a) 20 N (b) 100 N (c) 140 N

(a) 36 N (b) 75 N (c) 95 N (d) 156 N (e) 212 N

(a) greater than W. (b) equal to W. (c) less than W

(a) 3.2 m/s^{2} (b) 5.6 m/s^{2} (c) 7.4 m/s^{2} (d) 9.8 m/s^{2} (e) 12.5 m/s^{2 }

Two identical blocks, each of mass m, are connected to opposite ends of a string via a pulley, as shown in the figure. One block sits on a horizontal frictionless table and the other hangs vertically, with gravity pointing downward. The system is released from rest. What is the downward acceleration of the system?

(a) 2.45 m/s^{2} (b) 4.9 m/s^{2} (c) 7.35 m/s^{2} (d) 9.8 m/s^{2} (e) 12.3 m/s^{2}

(a) mg/2 (b) mg (c) 2mg

(a) larger than W. (b) equal to W. (c) less than W.

(a) f = 0 (b) f = F (c) f = W

(a) g_{planet} > g (b) g_{planet} = g (c) g_{planet} < g

(a) pointing up the hill. (b) zero. (c) pointing down the hill.

(T) True (F) False