Question

A toy truck has a speed of 10 m/s and kinetic energy of 50 J. What is its mass?A. 5 kgB. 4 kgC. 1 kgD. 3 kg

Answer 1

Given data:

Speed: 10 m/s

Ke = 50 J

m = ?

We can use the kinetic energy formula to find the mass of the toy truck:

`Ke=(mv^2)/(2)`
`\begin{gathered} 50=(m*10^2)/(2) \\ \\ 50*2=100m\Rightarrow(100)/(100)=m\Rightarrow m=1kg \end{gathered}`

m = 1kg