Question

6. An astronaut ona distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of +15 m/s and measures a time of 20.0 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due to gravity on this planet? See Diagram below: 20.0s v,15 m/s Show your work below: 7. Problem using vectors: A sailboat sails for 1 hr at 4 km/hr (relative to the water) on a steady compass heading of 40- east of north. The sailboat is simultaneously carried along by a current. At the end of the hour the boat is 6.12 km from its starting point. The line from its starting point to its location lies 60 east of north. Find the x (easterly) and y (northerly) components of the water's velocity. Draw a diagram of the above problem and show your work!

Answer 1

6.

using 2nd equation of motion

h = vt - 0.5 gt^2

since initial and final points are equal so

h = 0

0 = 15 * 20 - 0.5* g * 20^2

g = 1.5 m/s^2

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plz post other problem separately

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