A centripetal force 25N acts on a body of mass 0.5kg tied to a string of length 1.5m and wheeled around in a horizontal circle. Calculate the speed of the body.

The centripetal force $F_c = 25\, \text{N}$.
The mass of the body $m = 0.5\, \text{kg}$.
The length of the string (which is the radius of the circle) $r = 1.5\, \text{m}$.

The formula for centripetal force is:

where $v$ is the speed of the body.

To find $v$, we rearrange the formula:

Substitute $F_c = 25\, \text{N}$, $r = 1.5\, \text{m}$, and $m = 0.5\, \text{kg}$:

The speed of the body is approximately $\text{8.66 m/s}$.