Question
A car of mass 550 kg is moving at a speed of 1.5 m/s. A man pushes the car, increasing the speed to 3.2 m/s. How much work did the man do?
A. 3435 J
B. 2816 J
C. 2197 J
D. 4123 J
A. 3435 J
B. 2816 J
C. 2197 J
D. 4123 J
Answers
Henry
Work = The change in kinetic energy.
Work = KE2-KE1 = 0.5*m*V2^2-0.5*m*V1^2 = 0.5*550*3.2^2-0.5*550*1.5^2 = 2197 J.
Work = KE2-KE1 = 0.5*m*V2^2-0.5*m*V1^2 = 0.5*550*3.2^2-0.5*550*1.5^2 = 2197 J.