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 103. The exam period was 90 minutes; the mean score was 85.0; the median score was 91. Click here to see page1 page2 of the formula sheet that came with the exam.

A car makes a trip according to the position versus time graph shown to the right. The trip is composed of three separat segments, labeled A, B, and C.

In which one of the segments is the speed of the car the largest?

(a) A (b) B (c) C

(T) True (F) False

(a) (b) (c)

(a) F_{S} > F_{L} (b) F_{S} = F_{L} (c) F_{S} < F_{L}

A block is held by two strings as shown in the figure below. The string on the left is pulling horizontally and the string on the right pulls at an angle θ = 30° as shown. The tension in the right string is 320 N. (Gravity acts in the y direction.)

What is the tension in the left string?

(a) T_{L} = 320 N (b) T_{L} = 320 cos(30°) N (c) T_{L} = 320 sin (30°) N

(a) M = 7.3 kg (b) M = 18 kg (c) M = 28 kg (d) M = 72 kg (e) M = 180 kg

A basketball player is shooting the basketball 10 meters from the hoop. He releases the ball when it is 2 meters above the floor, with an initial velocity of 12 m/s, at an angle of 65° above horizontal as shown in the picture.

How long does it take the ball to reach the hoop?

(a) 0.83 s (b) 1.20 s (c) 1.97 s

(a) 1.9 m (b) 3.6 m (c) 4.4 m

(a) y_{max} = 6.8 m (b) y_{max} = 8.0 m (c) y_{max} = 8.5 m (d) y_{max} = 9.0 m (e) y_{max} = 9.5 m

(a) 0 m/s (b) 5.1 m/s (c) 12 m/s

(a) 12.5 s (b) 26.7 s (c) 40.0 s (d) 51.3 s (e) 80.0 s

(a) 360 N (b) 735 N (c) 1110 N

At t = 0 a ball is thrown straight upward from the edge of a cliff with initial velocity V_{0} = 25 m/s. It lands on the ground at the base of the cliff 7 seconds later.

At what time is the ball at its maximum height?

(a) t = 1.42 s (b) t = 2.55 s (c) t = 2.98 s (d) t = 3.56 s (e) t = 5.45 s

(a) H = 46 m (b) H = 53 m (c) H = 65 m (d) H = 76 m (e) H = 82 m

(a) | v | = 12 m/s (b) | v | = 25 m/s (c) | v | = 44 m/s (d) | v | = 50 m/s (e) | v | = 55 m/s

Assuming that the coefficient of kinetic friction between the box and the floor is the same in both cases, how does the magnitude of the frictional force exerted on the box by the floor compare?

(a) The frictional force in case 1 is larger than in case 2. (b) The frictional force in case 2 is larger than in case 1. (c) The frictional force is the same in both cases.

A box of mass M slides down a frictionless inclined plane that makes an angle θ with the horizontal.

What is the magnitude of the normal force acting on the box?

(a) M g (b) M g cos(θ) (c) M g sin(θ)

(a) 7 N (b) 17 N (c) 34 N (d) 98 N (e) 103 N

How fast did he swim relative to the water?

(a) 1.5 m/s (b) 2.5 m/s (c) 4 m/s (d) 5 m/s (e) 6 m/s

(a) 366 N (b) 535 N (c) 677 N (d) 1224 N (e) 2000 N

A block of mass M = 20 kg is at rest on a horizontal surface. It 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) 0.77 (e) 0.81

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