Common misconceptions about energy: (With Explanation) 1. Energy is truly lost in many energy transformations. (No energy is lost, its just transferred)

4.) Worker 1 lifts a mass M1=30kg straight up a distance of 4 meters in 9 seconds. Worker 2 lifts a mass M2 = 15kg straight up a distance of 3 meters is 2 seconds. Determine: a.) Which worker did more work? b.) Which worker developed more power?

QUESTION 5 Which of the following statements about energy is not true? The mechanical energy of a physical system is constant when the forces acting on the system are all conservative forces. a. O b. According to the work-energy theorem, the forces that contribute to the net work include all the conservative and nonconservative forces. c. The total energy of the universe is always conserved. O d. Energy can change form, but it cannot be created or destroyed. O e. Mechanical energy is always conserved ONH

A car accelerates from 10 km/hr to 40 km/hr, how much does its kinetic energy change? a) KE doubles, b) KE quadruples, c) KE increases eightfold, d) KE is cut in half, or e) you would need to know the mass of the car to determine the change in KE.

Question on Physics - Unit - Work and Energy Which of the following statement correctly describes the relationship between an objectsgravitational potential energy and its height above the ground? A. Proportional to the square of the objects height above the groundB. Directly proportional to the objects height above the groundC. Inversely proportional to the objects height above the groundD. Proportional to the square root of the objects height above the ground