Mechanical energy

If a moving object has PE = 1000 J and KE = 230 J, what is its mechanical energy?

• A. 770 J

• B. 1130 J

• C. 1230 J

• D. 1330 J

If an object's mechanical energy is 800 J and it's at its midpoint, what are its PE and KE values?

• A. PE = 800 J, KE = 0 J

• B. PE = 400 J, KE = 400 J

• 
  C. PE = 200 J, KE = 600 J

• D. PE = 0 J, KE = 800 J

At what point in a pendulum's swing is potential energy zero?

• A. At the highest point

• B. At the midpoint

• C. At the original position (A)

• D. At both maximum heights

If a moving object has a mechanical energy of 100 J, this means:

• A. Its potential energy alone is 100 J

• 
  B. Its kinetic energy alone is 100 J

• C. The sum of its PE and KE equals 100 J

• D. The difference between PE and KE is 100 J

What is mechanical energy (ME)?

• A. Only the kinetic energy of an object

• B. Only the potential energy of an object

• C. The product of potential and kinetic energy

• D. The sum of potential and kinetic energy