Ball Connected to a Rod As shown in Fig. 6-70, a 1.36 kg ball is connected by me

Question

Ball Connected to a Rod As shown in Fig. 6-70, a 1.36 kg ball is connected by means of two massless strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The tension in the upper string is 38 N.

Ball Connected to a Rod As shown in Fig. 6-70, a 1.36 kg ball is connected by means of two massless strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The tension in the upper string is 38 N. Figure 6-70 (b) What is the tension in the lower string? N (c) What is the net force on the ball? N (d) What is the speed of the ball? m/s

Explanation / Answer

a)

= arcsin((1.7/2)/(1.7)) = 30 degrees

(T1 - T2) sin30 = m g

(38 - T2) * 0.5 = 1.36 * 9.8

T2 = 11.344 11.3 N

b)

F = (T1 - T2) cos30 = (38 + 11.344) * 0.866 = 42.7 N

c)

F = m v^2/r

==> v = (rF/m) = (1.7*0.866*42.731904/1.36) = 6.80 m/s

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

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