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A car moving initially at 14m / s comes gradually to a stop in 273 m. What was the acceleration of the car?
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- Without turning around, a dog walks along a long straight path for 4.0 m at 3.0 m/s and then for 2.0 s at 6.0 m/s. What was the average speed of the dog?Walk along a long straight level path in the woods you go 30 m in 6.2 s, stop for 32 s, and then continue on in the same direction 40 m more in 15 s. What was your average speed for all of this?Without turning around a dog walks along a long straight path for 4.0m at 3.0m/s and then for 2.0s at 6.0m/s. What was the average speed of the dog?
- 1. A ship steams at a constant velocity of 15 m/s . (a) How far does it travel in a day? (b) How long does it take to travel 500 m? 2. Car moves at 50 m/s for 30s and then at 60 m/s for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip ?If an object is thrown straight up and reaches a height of 20 m, what was the initial speed of the object?A rocket-powered sled moves along a track, eventually reaching a top speed of 261 m/s to the west. It then begins to slow down, reaching a complete stop after slowing down for 3.37 s. What was the sled s average acceleration and velocity during the slowdown phase?
- Starting from rest, a bus leaves a gas station with a constant acceleration of 2 m/s˄2 until it reaches a speed of 10 m/s. The bus then continues to move with this speed (10 m/s) for 5 s. Then the bus decelerates at 2.5 m/s˄2 until it stops. What is the total distance traveled by the bus? (Answer: 95 m)The driver of a car traveling at 110km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a complete stop at 4.5s . What is the average acceleration of the car during braking?A hippopotamus can run up to 9.86 m/s. Suppose a hippopotamus uniformly accelerates 0.28 m/s² until it reaches a top speed of 9.86 m/s. If the hippopotamus has run 25.1 m, what is its initial speed in m/s? (round your answer to two decimal places; DO NOT include units)
- Wendy walks 10 m in one direction at 2 m/s, then runs 6 m in the same direction at 6 m/s. Next, she stops for 4 seconds and finally walks in the opposite direction at 4 m/s for 6 seconds. Wendy's average speed is closest to: 1. m/s 3. 1½ m/s 2. 1 m/s 4.2 m/s 6.3 m/s 5. 22 m/s 7.32 m/s 8. 4 m/s 9. The negative of one of the choices above 10. Impossible to determine. A cyclist reaches the top of a hill at 5.0 m/s and travels downhill with a constant acceleration, reaching the bottom in 8.3 s with a speed of 11.4 m/s. How long was the hill (total length down)?A rocket-powered sled moves along the track, eventually reaching a top speed of 230 m/s to the west. It then begins to slow down, reaching a complete stop after slowing down for 4.42 s. What was the sled s average acceleration and velocity during the slow down phase?