Help Needed Solving Physics Problem for Civil Engineering Student

[KingJason]

hi I am a student of civil engineering and have never done physics,this question was on my exam paper and am wondering if anyone can help me solve it.

A 0.5 kg ball is tied to a string 2 m long and the other end of the string is tied to a rigid support. The ball is held at an angle of 300 to the vertical, with the string pulled taut, and is then released.

(ii)What is the speed of the ball at the lowest point of its motion?

(iii) What is the tension in the string at this point?

thanks in advance

 

[tiny-tim]

Welcome to PF!

Hi KingJason ! Welcome to PF!

A 0.5 kg ball is tied to a string 2 m long and the other end of the string is tied to a rigid support. The ball is held at an angle of 300 to the vertical, with the string pulled taut, and is then released.

(ii)What is the speed of the ball at the lowest point of its motion?

(iii) What is the tension in the string at this point?

(you mean 30º?)

You'll need conservation of energy, Newton's second law and centripetal acceleration