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red123

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## Homework Statement

The Ball has a mass of 30 kg and a speed v = 4 m/s at the instant it is at its lowest point, θ = 0°. Determine the tension in the cord and the rate at which the ball's speed is decreasing at the instant θ = 20°. Neglect the size of the ball.

## Homework Equations

ΣF = ma

a

_{n}= v

^{2}/ρ

## The Attempt at a Solution

T = mg + mv

^{2}/ρ

= 30kg(9.81 m/s

^{2}) + 30kg(4 m/s

^{2})

= 414.3 N

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