6. What is a collision?
a. Two objects coming in contact with each other
b. Two objects repelling each other
c. Two external forces creating movement of an object
d. Two internal forces creating movement of an object
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The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?