(b) What is the y-component of the average velocity of the plane during the second leg of the trip, from city B to city C, in the given units? O 451 km/hour -270 km/hour OO km/hour O -451 km/hour
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- A car takes 5.0 s to go from v=0 m/s to v=24 m/s at constant acceleration. If you wish to find the disance traveled using the equation d=1/2at squared, what value should you use for a? Express your answer to two significant figures and includ the appropraite units.A student drops an object out the window of the top floor of a high-rise dormitory. (a) Neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 2.4 s? Express the speed in mi/h for a familiar comparison.During a test, a rocket travels upward at Va = 60 m/s and when it is Sa = 20 m from the ground its engine fails. Determine the maximum height Sb reached by the rocket and its speed just before it hits the ground. use 2 decimal places.
- On May 26, 1934, a streamlined, stainless steel diesel train called the Zephyr set the world’s nonstop longdistance speed record for trains. Its 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 its average speed in km/h and m/s?10. Ā = -2â + -3ŷ and B = -4â + -4ŷ. Calculate R = Ã+B. Calculate 0, the direction of R. Recall that 0 is defined as the angle with respect to the +x-axis. A. 49.4° B. 130.6° C. 229.4° D. 310.6°A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 85.0 km/h, 17.0 min at 90.0 km/h and 55.0 min at 40.0 km/h, and spends 35.0 min eating lunch and buying gas. (a) Determine the average speed for the trip. km/h (b) Determine the distance between the initial and final cities along this route. km
- A student drops an object out the window of the top floor of a high-rise dormitory. (a) Neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 3.9 s? First used standard British units and then express the speed in mi/h for a familiar comparison. (ft/s and mi/h) (b) How far, in meters, does the object fall during the 3.9 s? Comment on how many floors the dormitory probably has. (Assume that there are 32 floors/100 m.)The world record for the hundred meter dash is 9.58 s.What is the corresponding average speed in units of m/s,km/h,ft/s,and mi/h? At this speed, how long would it take to run 1.00 x 102 yards?A car is traveling back and forth. Its velocity (in feet per second) after t seconds is given by v(t) = 9−3t.Determine the position of the car after four seconds if s(0) = 0 (where s(t) is the position functionfor the car).a)Find the total distance the car traveled from t = 0 to t = 4
- a motorist suddenly notices a stalled car and slams on the brakes, decelerating at the rate of 6.3 meter per second square. unfortunately, this isn't good enough, and a collision ensues. from the damage sustained, police estimate that the car was moving at 18km/h at the time of collision. they also measures skid marks 34m long. (a) how fast was the motorist going when brakes were first applied? (b) how much time was elapsed from the initial braking to the collision?On May 26, 1934, a streamlined, stainless steel diesel train called the Zephyr set the world's nonstop long-distance speed record for trains. Its 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 its average speed in km/h? km/h What was its average speed in m/s? m/s