The ball has a mass of 30 kg and a speed v = 4 m/ s at the instant it is at its lowest poi...

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.