Question

What centripetal force is needed to keep a 5 - kg ball moving in a circle of radius 3m at a speed of 7 m/s?

Answer 1

Given,

Mass of the ball, m=5 kg

Radius of the ball, r=3 m

Speed of the ball, v=7 m/s.

To find

The centripetal acceleration

Step-by-step explanation

The centripretal force is given by

`F=(mv^2)/(r)`

Putting the values

`F=5*(7^2)/(3)=81.66\text{ N}`

Conclusion

The centripetal acceleration is 81.66 N