What is the tension in a string used to twirl a 0.5 kg ball at a speed of 3 m/s in a circle of 1.5-meter radius? What is the force to break the string

As a rotating disk slows down from an angular velocity of 2 rad/s to a stop, it makes 40 revolutions. Assuming a constant angular deceleration, estimate the time it takes to come to a stop.

A car is traveling at 25 m/s between 𝑡= 0 s and 𝑡= 8 s. At 𝑡= 8 s, the driver sees a red light ahead and steps on the brakes. The car’s acceleration has a magnitude of 5 $$\frac{m}{s^2}$$   ; the car eventually comes to rest at the traffic light. How far has the car traveled since 𝑡= 0?