Question

A bowling ball is whizzing down the bowling lane at 4 m/s. If the mass of the bowling ball is 7-kg, what is its kinetic energy? 52 J 48 J 56 J 66 J

Answer 1

`Given:\\m=7kg\\v=4(m)/(s) \\\\Find:\\E_k=?\\\\Solution:\\\\E_k=(mv^2)/(2) \\\\E_k=(7kg\cdot (4(m)/(s))^2)/(2) =(7kg\cdot 16(m^2)/(s^2) )/(2) =7kg\cdot 8(m^2)/(s^2) =56J`

Answer 2

the translation kinetic energy would be
1/2mv^2 thus
1/2* 7 * 16
which comes to 56