After closing the throttle, a car slides down a slope from the top with an initial speed of 3m / s, and the speed at the bottom just becomes zero. If the car slides down from the top with an initial speed of 5m / s after closing the throttle, the speed at the bottom will be () A. 1m/sB. 2m/sC. 3m/sD. 4m/s

According to the velocity displacement formula v2-v02 = 2aX of uniform speed change linear motion, the equation is listed, that is: v21 − V201 = 2aX & nbsp; & nbsp; V22 − v202 = 2aX, which can be obtained by combining the two equations: v21 − V201 = V22 − v202, and substituting the data to get: V2 = 4m / s, so select: D

RELATED INFORMATIONS

1. The acceleration of the car running at 12m / S is 5m / S ^ 2 after emergency braking, and the displacement within 6S after ball braking
2. When the car is running at the speed of 8m / s and the acceleration after emergency braking is 6m / S2, what is the displacement within 4S after braking? What is the speed at the end of 4 seconds?
3. It takes 5 minutes for a train to go from standstill to 100 km / h, and 10 seconds for a car
4. What is the maximum acceleration of a car when accelerating from static to 100km / h, and the shortest time is 5S What is the maximum acceleration of a car when accelerating uniformly from static speed to 100km / h, and the shortest time is 5S? If the car brakes after accelerating to 108km / h, and the car stops after 5S, how much is the acceleration after braking? What's the direction? I'm a freshman. I don't quite understand
5. When the vehicle starts from a standstill with an acceleration of 2m / S2, what is the speed of the vehicle at the end of the fifth second? What is the average speed of the car in the fifth second? What is the displacement of the car in the fifth second?
6. If the vehicle starts to move from standstill with an acceleration of 2m / S ^ 2, the speed of the vehicle at the end of the fifth second is____ M / s, the average speed of the car in the fifth second is____ M / s, what is the displacement of the car in the fifth second___ m
7. The average speed of the car in the fifth second can be calculated by making the car move in a straight line with the acceleration of 2m / S2 from the static state______ ．
8. How many seconds does it take for a car with a speed of 110km / h and a length of 3m to overtake a truck with a speed of 100km / h and a length of 17m on the expressway?
9. On the expressway, a 5m long car with a speed of 110km / h is going to overtake a 15m long car with a speed of 100km / h. (equation) Can a car overtake a cart? If so, how long will it take?
10. As shown in the figure, a car starts from o point and runs eastward at a constant speed of 100 km / h along a straight road along the coast. When the car starts, there is a speedboat at m on the sea 500 km south by east of o point and 300 km away from the coast MQ. Starting at the same time with the car, to deliver an important item to the driver of the car, ask at least what speed the speedboat must travel Only when the speedboat is running at the minimum speed, can the goods be delivered to the driver
11. The acceleration of a car traveling at 10m / s after emergency braking is 4m / S ^ 2. How much displacement of the car within 2S after braking and how much displacement is within 3S after braking?
12. When a car is running at a constant speed of 20 m / s and reaches an acceleration of 4 m / S2 after emergency braking, what is the displacement within 8 s after braking? Such as the title
13. The acceleration of a car traveling at 10m / s after emergency braking is 6m / S2, and the displacement within 5.0s after braking is calculated Please answer the questions quickly
14. When the acceleration is 4m / S & sup2; after emergency braking at the speed of 10m / s, then () A. the displacement is 12m within 2S after braking The displacement of B is 12.5m within 2S after braking C. The displacement within 3S after braking is 12m D. the displacement within 3S after braking is 12.5m
15. The car runs on the road at a speed of 10m / s, and then decelerates at a speed of 2m / S 2 after braking. The speed at the end of 4S and the displacement of the car in 8s after braking are calculated
16. When the car runs at a constant speed V, the acceleration after braking is a, and it moves in a straight line at a constant deceleration, the displacement after T & nbsp; seconds is () A. Vt-at22b. V22ac. - vt + at22d. Cannot be determined
17. The car runs at a speed of 15 meters per second, and starts to brake from a certain moment. After braking, the car moves in a straight line with uniform deceleration, and the acceleration is 6 meters per square second When the car runs at a speed of 15 meters per second, it starts to brake from a certain moment, and then makes a uniform deceleration linear motion. If the acceleration is 6 meters per square second, the displacement of the car in 3 seconds after braking is?
18. If the two physics move in a straight line at a constant speed, the speed of a is 2m / s, and the speed of B is 3m / s, then the ratio of the distance they pass and the time they spend is correct A. If the time ratio is 1:1, the distance ratio is 2:3 B. if the time ratio is 1:1, the distance ratio is 3:2 C. If the distance ratio is 1:1, the time ratio is 3:2 D. if the distance ratio is 1:1, the time ratio is 2:3
19. On the straight road, car a and car B move in the same direction. Car B moves in a straight line at a speed of 3 M / s. when car B is 4 m in front of car a, car a will leave the road At rest, it starts to make a uniform acceleration linear motion with an acceleration of 2 m / S2. When car a catches up with car B, it immediately makes a uniform deceleration linear motion with an acceleration of - 4 m / S2. How long will it take car B to catch up with car a again?
20. A and B start from the same place along the same road at the same time. A's speed is 2m / s, B's speed is 3m / s, after 5 minutes How far away are they from each other? There are two kinds of solutions, both written out, and there must be a process