Question

A baby carriage is rolling down a hill at 18m/s. If the carriage has 90J of kinetic energy, what is the mass of the carriage?

Answer 1

Given

The velocity of the carriage, v=18 m/s

The kinetic energy is , K=90 J

To find

The mass of the carriage

Step-by-step explanation

Let the mass of the carriage be m

Thus,

`\begin{gathered} K=(1)/(2)mv^2=90 \\ \Rightarrow(1)/(2)m*18^2=90 \\ \Rightarrow m=0.55\text{ kg} \end{gathered}`

Conclusion

The mass is 0.55kg