please answer questions 005,006,007,008 they are belong to each others This prin

Question

please answer questions 005,006,007,008 they are belong to each others
This print-out should have 10 questions. Answer in units of m/s. e-choice questions may continue on Multipl 007 (part 3 of 4) 10.0 points the next column or page find all choices What is the difference in the time the balls spend in the air? Answer in units of s. 001 (part 1 of 2) 10.0 points A plane lands with a velocity of +125.3 m/s 008 (part 4 of 4) 10.0 points and decelerates at a maximum rate of 6.2 far apart are the balls 0.814 s after they From the instant the plane touches the run- are thrown Answer in units of m. way, what is the minimum time needed before it can come to rest? 2.0 points 009 Answer in units of s. The plot shows r(t) for a particle. 002 (part 2 of 2) 10.0 points The plane is landing on a naval aircraft carrier that is 0.80 km long. What distance does the plane require to Which statement is correct about the mo- Answer in units of km. tion A car 003 (part 1 of 2) 10.0 points a portion of a starts from rest and travels for 6.5 s 1. The particle moves along with a uniform acceleration of +1.8 m/s circle, as the sketch shows directly. The driver then applies the brakes, causing a uniform deceleration of 1.5 m/s 2. The particle follows the path of a projec- If the brakes are applied for 2.1 s, how fast tile, like a thrown baseball. is the car going at the end of the braking 3. The particle moves at constant speed, but not at constant velocity. Answer in units of m/s. 4. The particle slows down, comes momen- 004 (part 2 of 2) 10.0 points tarily to a rest, then returns with increasing How far has it gone from its start speed to its starting point. Answer in units of m 5. The particle at first speeds up, then slows 005 (part 1 of 4) 10.0 points Two students are on a balcony 18.8 m above down, then speeds up again. the street. One student throws a ball ver- 2.0 points at 15.2 m/s. At the same tically downward instant, the other student throws a ball verti- cally upward at the same speed. The second The graph shows the velocity v as a function ball just misses the balcony on the way down. of time t for an object moving in a straight What is the magnitude of the ve the first ball as it strikes the ground? Answer in units of m/s 006 (part 2 of 4) 10.0 points what is the magnitude of the velocity of the Which graph shows the corresponding dis- function of time t for the second ball as it strikes the ground? as a

Explanation / Answer

005).Initial velocity u = 15.2 m/s

Accleration a = g = 9.8 m/s 2

Distance S = 18.8 m

Magnitude of the velocity of the first ball as it strikes the ground v = ?

From the relation v 2 - u 2 = 2aS

v 2 - 15.2 2 = 2(9.8)(18.8)

v 2 = 599.52

v = 24.48 m/s

(006).The magnitude of the velocity of the second ball as it strikes the ground v ' = v = 24.48 m/s

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