The block shown at right is pushed by a 45 N force. Find the magnitude of the ne

Question

The block shown at right is pushed by a 45 N force. Find the magnitude of the necessary friction force to keep it at rest. The block shown at right is pushed by a 50 N force. Find the magnitude of the necessary friction force to keep it moving at constant velocity. The block shown at right is pushed by a 50N force. The friction force acting on it is equal to 30 N. Find the magnitude of the acceleration of the block. The block shown at right is pushed by a 60 N force. Find the magnitude of the necessary friction force to keep it moving with an acceleration equal to 2 m/sec^2.

Explanation / Answer

1) total force is zero

F = f

f = 45 N

2) total force is zero

f = F = 50 N

3) m = 20 kg

ma = F-f = 50-30 = 20

a = 20/20 = 1 m/s^2

4) ma = 60-f

f = 60-20*2 = 60-40 = 20 N

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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