A rock of mass m 3.70 kg is tied to a string and made to revolve in a vertical a

Question

A rock of mass m 3.70 kg is tied to a string and made to revolve in a vertical arde of radis r-0.740 m, as in the figure. If the rock's speed is a constant $.00 m/s, determine the magnitude of tension in the string when the rock is at the bottom of the circle. Part 1 of 8 Read the problem carefully at least once Be sure to notice quantities that are known and those quantities we're being asked to find. The known quantities are the rock's mass, its speed, and the length of the string. The unknown quantity to be determined is the magnitude of tension T in the string when the rock is at the bottom of the circular path. The rock is moving along a circular path at constant speed, so it is executing uniform circular motion. Therefore ts acceleration has magnitude and is directed toward the center of the circle. Identify all the forces acting on the rock the gravity force and the tension force the gravity force the tension force none of the above Sudorm Skle vou cannolt.come beck)

Explanation / Answer

here,

mass , m = 3.7 kg

r = 0.74 m

speed , v = 5 m/s

the forces acting on the rock are the gravity force and the tenskion force

the magnitude of tension in the strng when the rock is at the bottom of the circle , T = m * ( v^2 /r + g)

T = 3.7 * ( 5^2 /0.74 + 9.81) N

T = 161.3 N

the magnitude of tension in the strng when the rock is at the bottom of the circle is 161.3 N

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