At the lowest point in a vertical drive(radius = 0.69 km), an airplane has a spe

Question

At the lowest point in a vertical drive(radius = 0.69 km), an airplane has a speed of 320 km/h which is not changing. Determine the magnitude of the acceleration of the pilot at this lowest point. 7.8 m/s^2 15 m/s^2 11 m/s^2 23 m/s^2 1.8 m/s^2 A particle moves in the xy plane in a circle centered on the origin. at a certain instant the velocity and acceleration of the particle are 6.8i m/s and (7.0i - 6.0j) m/s^2. what are the x and y coordinates of the particle at this moment? x = 0, y = -5.0 m x = 6.8 m, y = + 7.7 m x = 0, y = -7.7 m x = 0, y = +5.0 m x = 0, y = +7.7 m A river has a steady speed of 0.34 m/s. A student swims downstream a distance of 1.7 km and returns to the starting point. if the student swims with respect to the water at a constant speed and the downstream portion of the swim requires 15 minutes, how much time is required for the entire swim? 23 minutes 18 minutes 31 minutes 53 minutes 38 minutes

Explanation / Answer

Solving 1st question as per chegg policy

9.velocity=v=320 km/hr=88.89 m/s

r=0.69 km=690 m

acceleration=v^2/r=11.45 m/s^2

(c) is correct

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