Author Question: A 5.0-m long, 12-kg uniform ladder rests against a smooth vertical wall with the bottom of the ... (Read 497 times)

genevieve1028 · **on:** Jul 29, 2018

A 5.0-m long, 12-kg uniform ladder rests against a smooth vertical wall with the bottom of the ladder 3.0 m from the wall. The coefficient of static friction between the floor and the ladder is 0.28.

What distance, measured along the ladder from the bottom, can a 60-kg person climb before the ladder starts to slip? A) 4.0 m
B) 3.7 m
C) 1.7 m
D) 1.3 m
E) 3.3 m

Question 2

From what height above the surface of the earth should an object be dropped to initially experience an acceleration of 0.9200g? The radius of the earth is 6.38 106 m.

A) 272 km
B) 260 km
C) 554 km
D) 510 km