Question

A pendulum is made of a small sphere of mass 0.250 kg attached to a lightweight string 1.20 m in length. As the pendulum swings back and forth, the maximum angle that the string makes with the vertical is 34.0â. Friction can be ignored._______

Answer 1

Answer:

T=3.29 N

Explanation:

let V be the speed at low point

From conservation of energy

0.5mV²=m*g*l*(1-cos(∅))

(mV²/l)=2m*g*(1-cos(∅))

Nowat low point

T-mg=mV²/l

T=mg+2mg((1-cos(∅))

T=mg(3-2cos(∅))

T=0.25*.81*(3-2cos(34))

T=3.29 N