If v = 3i + 4j + 5k is the instantaneous velocity of a body of mass 1.50 kg. Calculate its kinetic energy.

If v = 3i + 4j + 5k is the instantaneous velocity of a body of mass 1.

1.	If v = 3i + 4j + 5k is the instantaneous velocity of a body of mass 1.50 kg. Calculate its kinetic energy.
Answer» SOLUTION :V = 3i + 4j + 5k , MASS = 1.5 KG Kinetic energy K.E. `= (1)/(2) mv^(2)` `= (1)/(2) 1.5 (3i + 4j + 5k). (3i + 4j + 5k)` `= (1.5)/(2) (9 + 16 + 25) = (1.5)/(2) xx 50 = 37.5` joules