1. An object whose weight is 7.8 N is being help motionless by friction on a the

Question

1. An object whose weight is 7.8 N is being help motionless by friction on a theta:25 degrees incline. The coefficient of static friction between the object and the plane is 0.83. The magnitude of the force due to static friction currently acting on the object is:

a. 3.3N (answer)



2. One end of a 2.0 m string is fixed, the other end is attached to a 1.0 kg stone. The stone swings a vertical circle, passing the top point at 5.0 m/s. The tension force of the string at this point is:

b. 2.7 N (answer)


How do I do the problems above? i would appreciate any kind of help.

Explanation / Answer

a.
F = k Ncos - kNsin

F = (5.87 - 2.74) = 3.3N

b.

T = mv^2/r - mg = 12.5 - 9.8 = 2.7N

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.