A toy car of mass 100 ~g is moving with velocity of ( i +2 j -3 k ) m , then the kinetic energy of the car is

Step-by-step solution

Mars, m=100 ~g =0.1 ~kg velocity, v = i +2 j -3 k Magnitude of velocity, |v|= ( i )^2+(2 j )^2+(-3 k )^2 = 14 Kinetic energy is given as, K = 1 2 mv ^2= 1 2 0.1 ( 14 )^2=0.7 ~J