Question

A wrecking ball of mass 500 kg hangs form a crane by a cable of length 25 mit
this wrecking ball is released from an angle of 40 degrees, what is the height
from the lowest point of the arc? *

A. 25 m
B. 0 m
C. 12.5 m
D. 5.85 m

Answer 1

Given :

A wrecking ball of mass 500 kg hangs form a crane by a cable of length 25 m

this wrecking ball is released from an angle of 40 degrees.

To Find :

The height  from the lowest point of the arc.

Solution :

From the attached image we have to find the value of  h.

So,

$cos \ 40^o = \dfrac{L-h}{L}\\\\0.76=\dfrac{25-h}{25}\\\\h = 25( 1- 0.76)\\\\h = 6 \ m$

Hence, this is the required solution.