3. A 25.0-kg box of textbooks rests on a ramp that makes an angle with the horizontal. The coefficient of kinetic friction is 0.25, and the coefficient of static friction is 0.35. As the angle is increased, find the minimum angle at which the box starts to slip.

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1. A Christmas light hangs on a series of strings as shown in the figure 1. The tension on string a , Ta, is 0.48 N.
(a) What is the tension on string b?
2. Two masses are attached to a uniform meter stick as shown in the figure 2. The masses of m1 and m2 are as given
and the meter stick weighs 150 g. A force F with unknown magnitude is applied on one end of the stick at an angle of
30° to balance the system. What is the magnitude of F?
3. A 25.0-kg box of textbooks rests on a ramp that makes an angle with the horizontal. The coefficient of kinetic
friction is 0.25, and the coefficient of static friction is 0.35. As the angle is increased, find the minimum angle at which
the box starts to slip.
Transcribed Image Text:1. A Christmas light hangs on a series of strings as shown in the figure 1. The tension on string a , Ta, is 0.48 N. (a) What is the tension on string b? 2. Two masses are attached to a uniform meter stick as shown in the figure 2. The masses of m1 and m2 are as given and the meter stick weighs 150 g. A force F with unknown magnitude is applied on one end of the stick at an angle of 30° to balance the system. What is the magnitude of F? 3. A 25.0-kg box of textbooks rests on a ramp that makes an angle with the horizontal. The coefficient of kinetic friction is 0.25, and the coefficient of static friction is 0.35. As the angle is increased, find the minimum angle at which the box starts to slip.
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