Serway_CP_poll_ch02

# Serway_CP_poll_ch02 - A parachutist jumps out of an...

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A parachutist jumps out of an airplane and accelerates with pulls the parachute cord and after a 4-second deceleration, descends at 10 m/s for 60 seconds, reaching the ground. From what height did the parachutist jump? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 874 m 2. 1136 m 3. 1524 m 4. 1750 m

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A 50-gram superball traveling at 25 m/s is bounced off a brick event. If the ball is in contact with the wall for 3.5 ms, what is the average acceleration of the ball during this time interval? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 13,428 m/s 2 2. 6,715 m/s 2 3. 857 m/s 2 4. 20 m/s 2
A drag racer starts from rest and accelerates at 10 m/s 2 for the entire distance of 400 m (1/4 mile). What is the velocity of the race car at the end of the run? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 45 m/s 2. 90 m/s 3. 135 m/s 4. 180 m/s

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A basketball player can jump 1.6 m off the hardwood floor. With what upward velocity did he leave the floor? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1.4 m/s 2. 2.8 m/s 3. 4.2 m/s 4. 5.6 m/s
A Cessna aircraft has a lift-off speed of 120 km/hr. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240 m? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 2.32 m/s 2 2. 3.63 m/s 2 3. 4.64 m/s 2 4. 5.55 m/s 2

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A water rocket, launched from the ground, rises vertically with an acceleration of 30 m/s 2 runs out of "fuel." Disregarding air resistance, how high will the rocket rise? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 15 m 2. 31 m 3. 61 m 4. 121 m
Two stones are thrown from the top edge of a building with a speed of 20 m/s, one straight down and the other straight up. The first one hits the street in a time t 1 . How much later is it before the second stone hits? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 5 s 2. 4 s 3. 3 s 4. not enough information is given to work this problem

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An x vs. t graph is drawn for a ball moving in one velocity of the ball is zero. We can be positive that, at t = 5 s, 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. the slope of the curve is non-zero. 2. the ball has stopped. 3. the acceleration is constant. 4. the curve is at x = 0, t = 0.
At the top of a cliff a 100 m high, a rock is thrown upward with velocity 15 m/s. How much later should a second rock be dropped from rest so both stones arrive simultaneously at the bottom of the cliff?

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Serway_CP_poll_ch02 - A parachutist jumps out of an...

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