A 75.0 kg ladder that is 3.00 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.2 m from the base of the ladder. The coefficient of static friction at the base of the ladder is 0.400. There is no friction between the wall and the ladder. What is the minimum angle the ladder makes with the horizontal for the ladder not to slip and fall?



A. 35 degrees

B. 45 degrees

C. 53 degrees

D. 60 degrees

E. 65 degrees


B. 45 degrees

Physics & Space Science

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Mercury and the Moon appear similar, but we note that:

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A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.The power consumed by the light bulb in watts is

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According to two different estimates, coal reserves can be 250 Gt or 450 Gt, almost twice as much. Why is it so difficult to pin down the reserves' total?

What will be an ideal response?

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Which carbohydrate cannot be digested by humans as a direct source of energy?

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