Answer:
950-kg subcompact car be moving to have the same kinetic energy of truck at 116.08 km/hr
Explanation:
Kinetic energy of body with mass m and moving at velocity v is given by
[tex]KE=\frac{1}{2} mv^2[/tex]
KE of truck [tex]= \frac{1}{2}*3.2*10^4*20^2[/tex]
KE of subcompact car [tex]= \frac{1}{2}*950*v^2[/tex]
Equating
[tex]\frac{1}{2}*3.2*10^4*20^2= \frac{1}{2}*950*v^2\\ \\ v=116.08 km/hr[/tex]
So 950-kg subcompact car be moving to have the same kinetic energy of truck at 116.08 km/hr
