Activity 2: Calculating Kinetic and Potential Energy
Directions/Instructions:
1. Read and understand the problems about kinetic energy and potential energy very well.
2. Use the back sheet of your paper for your computations. Make sure to box your final answer. Write your final answer on the line provided for each number.
3. Use the given formula to solve the following problems. Use GRESA method in solving the problem sets below.
PE = mgh KE= ½ mv2
G – given
R – required
E – equation
S – solution
A - answer
Problem Sets
1. A bag of groceries with a mass of 6 kg is lifted to a height of 2 m. What is the increase in potential energy of the bag at this point?
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2. What is the increase in potential energy of a 4.5-kg barbell when it is lifted by the weightlifter 1.5 m above the floor?
________________________________________________________________________ 3. A 3-kg fish is swimming with a speed of 0.2 m/s. What is its KE? _________________________________________________________________________
4. What is the KE of an 8-kg object moving at a speed of 5 m/s? _______________________________________________________________________