Question

A boy throws a water balloon at his friend. If the work done on the balloon is 20j and it has a mass of 1kg what is the speed of the balloon

Answer 1

The speed of of the balloon is about 6.32 m/s

Step-by-step explanation:

Assuming all of the work done is transformed into the balloon's kinetic energy, we can use the formula for the kinetic energy to answer the question:

`E_k=(1)/(2)mv^2\\20J = (1)/(2)1kg\cdot v^2\implies v=\pm\sqrt{40(m^2)/(s^2)}\approx\pm6.32(m)/(s)`

Speed is the absolute value of velocity, so the speed of the balloon is about 6.32 m/s