Question

A man is carrying a trolley of mass 6kg and having K.E. of 40 J . Calculate its velocity with which he is running .

Answer 1

As we know that K.E = 1/2 mv² so
by arranging it
K.E ×2÷6 = v²
now by putting values
v²=13.33 m²/s²
so
v= 3.65 m/s....

Answer 2

The formula to find kinetic energy is -


`K.E. = (1)/(2)*m* v^(2)`

Where,


`m = mass`

and


`v = velocity`

So, putting the values in the formula we get -


`40 = (1)/(2) *6*v^(2)`


`(40)/(3) = v^(2)`


`\sqrt (40)/(3) = 3.6514 m/s`