A car traveled at a rate of 50 km/hr for 8 minutes and then at 25 km/hr for 7 min and finally at 20 km/hr for 2 min. What is APPROXIMATELY the average speed for the complete trip * ?of the car in (m/sec)

On May 26, 1934 a stainless steel diesel train called the zephyr set the world's nonstop distance speed record for trains.  It's run from Denver to Chicago  took 13 hours, 4 minutes,  58 seconds,  and was witnessed by more than a million  people along the route. The total distance traveled was 1633.8 km what was average speed in km/h? Km/h What's the average speed in m/s? M/s

A car making a 110.0 mi journey travels at 51.5 mi/hr for the first 38.1 mi. At what speed must it travel during the rest of the journey so that the average speed for the entire trip is 68.5 mi/hr? 83.0 mi/hr

Figure below shows the position of a cart moves along the x-axis. What is the object's velocity at 2.0 s, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. x (m) 2 1 A K 0 T -1 -2 B 2 4 6 8 10 C D 12 14 X6 E 18 -t (s)

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The equation for the motion of an object with constant acceleration is d= do + vt + at, where d is distance from a given point in meters, do is the initial distance from the starting point in meters, v is the starting velocity in meters per second, a is acceleration in meters per second squared, and t is time in seconds. A car is stopped at a traffic light. When the light turns green, the driver begins to drive, accelerating at a constant rate of 4 meters squared. A bus is traveling at a speed of 15 meters per second in another lane. The bus is 7 meters behind the car as it begins to accelerate. per second Find when the bus passes the car, when the car passes the bus, and how far each has traveled each time they pass one another. it lad wod

In coming to a stop, a car leaves skid marks 79 m long on the highway. Assuming a deceleration of 4.20 m/s. estimate the speed of the car just before braking. Express your answer using two significant figures.   V= ??? m/s

If an average-size man jumps from an airplane with an open parachute, his downward velocity t seconds into the fall is v(t) = 20(10.2) feet per second. (a) Use functional notation to express the velocity 3 seconds into the fall. Calculate it. ft per sec (b) Explain how the velocity increases with time. Include in your explanation the average rate of change from the beginning of the fall to the end of the first second and the average rate of " change from the fourth second to the fifth second of the fall. This answer has not been graded yet. (c)-Find the terminal velocity. ft per sec (d) Compare the time it takes to reach 99% of terminal velocity here with the 25 seconds it took a skydiver with his parachute closed to reach 99% of terminal velocity in Example 2.1. On the basis of the information we have, which would you expect to reach 99% of terminal velocity first, O feather feather or a cannonball? O cannonball Need Help? Read It

The velocity - time graph of the journey of a person is shown in the attached graph. How much distance, in meters, did the person cover during the whole journey, from time = 0 to time = 50 seconds? Round your answer to the nearest integer. Speed (m/s) 25 20 15 10 5 0 0 10 20 Time (s) 30 40 50

A stone is dropped into a well. The sound of the splash is heard 5.00 s later. What is the depth of the well? (Take the speed of sound to be 343 m/s.) Number i Units