## Question

###### The figure below shows a ball of mass m=2.4 kg which is connected to a string...

The figure below shows a ball of mass m=2.4 kg which is connected to a string of length L=1.9 m and moves in a vertical circle. Only gravity and the tension in the string act on the ball. If the velocity of the ball at point A is Vo=8.6 m/s, what is the tension Tin the string when the ball reaches the point D? D Am L .c B

## Answers

А mg energy conservation assume that P. G at boint B ir zoo kinetic energy at boint Bis (k. Esa 1m 42 (P.E) Potential energy at boint A if = (p. Ea mga point A (K. E) Azt mu? (P.E. A + VC. En Uc. mgc + + b 4 2 = AL K.E at E) = (P.E/ + C) ot 2 Yo = 11.128 m/s p.f at point D is (P. El amg (2L) ke at boint D is kifah me (P.E/B +( KE) D of (P. E), + (16. Elo Ang to + I 2 12 = mg (24) + 1 44² v2 = 63.065 mg + T = 2 1² Ta mvh-mg S6.141

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