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- Starting from rest, a car experiences an acceleration, a, causing it to start moving. It reaches itsfinal velocity, v, after accelerating for a time At.A second car that also starts from rest experiences the same acceleration for twice as much timeas the first. What is the second car's final velocity? a) vb) 1/2vc) 2vd) 1/4ve) 4v What is 90 km/hr expressed in m/s?a 25 m/sb) 324 m/sc) 1.5 m/sd) 15 m/s1. A car on a straight level road is stopped for a red a light? On the green light it uniformly accelerates to a velocity of 8 m/s. In 3 mins what is its acceleration? 2. A jet plane flying at 100 m/s uniformly accelerated to a cruising speed, In 20 mins what is the acceleration during this time?A runner makes one lap around a 200 m track in a time of 25.0 s. What was the runner's average speed? What is the average velocity? 2.
- Vaug= 6. A flowerpot drops off the roof of a tall building. a) What is the velocity of the flowerpot at the end of 3.00 seconds of its fall? b) What is the velocity at the end of 4.00 seconds of its fall? c) What is the average velocity for the fourth second of the fall? d) What is the distance travelled during the fourth second?4. A sprinter begins from rest and accelerates at the rate of 2 m/s? for 200 m. a) What is the sprinter's velocity at the end of the 200 m? b) How long does it take him to coyer it? T600me Sumee, talefral 2 rch Vイー160 vi=Oms 16000 ニし, (600 -0 5. A plane accelerates from 2 m/s at the rate of 3 m/s² over 530 m distance. a) How long does it take the plane to cover this distance? b) What is its velocity at the end of this 530 m distance? VA ASー 6. A box falls off the tailgate of a truck and slides a distance of 62.5 m before coming to a halt. If friction slows the box at the rate of 5 m/s?: a) What was the speed of the truck when the box fell? b) How long does it take the box to stop?2. With an initial velocity of 20 km/h, a car accelerated at 8 m/s2 for 10 seconds. a) What is the position of the car at the end of the 10 seconds? b) What is the velocity of the car at the end of the 10 seconds?
- Diane dives in a pool moving at 7.6 m/s until reaching 8.42 m from the diving board. Solve thefollowing:a. The average acceleration of the diver as she travels through the waterb. Time the diver comes to a stopC. The speed of the diver after diving 5.87 mDetermine the acceleration in each case, match the answers with questions. A car is moving to the right with a constant speed of 20 m/s for 5.0 s. A car is going to the right, from rest to 20 m/s in 5.0 s. + A car is going to the right, from 20 m/s to rest in 5.0 s. A. acceleration = 4.0 m/s² B. acceleration = 0 C. acceleration = - - 4.0 m/s² D. acceleration = 100 m/s² E. acceleration = - 100 m/s²A ball is dropped from a window 50 m above the ground. a) How long does it take the ball to reach theground?b) What is its final velocity?2. A pebble was dropped from the window of a building, 80 meters above the ground. a) How many seconds willit take the pebble to reach the ground? b) How fast is it after 2.0 seconds? c) When will its velocity be 25 m/s?3. A stone is tossed upward at the moment a ball is dropped from a height of 25 meters. The stone’s initialvelocity is 25 m/s. At what height will the two meet? In how many seconds.4. A ball is thrown downward with an initial velocity of 20 ft/s. a) How fast is it moving 2s later? b) How fardoes it fall in these time ?
- QUESTION 1 A rider on horseback moves according to the velocity vs. time graph shown. Find the rider's average acceleration over segment C. 8. B/ C A 10 15 20 25 Time, t (s) A. 0.4 m/s? В. -2.5 m/s? -0.4 m/s? D. 0 m/s? E. none of the above 6 2. Velocity, v (m/s)4. what is the displacement from the start to the end of the path (between t=0 sett=10 s)? 5. what is the average speed from the beginning until t=7s? 6. what is the average acceleration over the entire courser?a stone ejected vertically upward from the ground with an initial velocity of 4 m/s. it hits the ground after 0.82seconds 1. What was the acceleration of the stone as it's highest point? 2. What was the stone's velocity at the highest point? 3. How many seconds did it take the stone to reach the highest point? 4. What was the velocity of the stone as it hit the ground? Give the magnitude and direction.