II. Solve for Potential Energy and Kinetic Energy of the following. Use GRESA Method1. What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?2. A 30 kg child climbs 15 meters up a tree. When he look arounds, what is the child's potentialenergy?(pls use Gresa method..)
Answer (1)
1. Kinetic Energy Calculation- G (Given): - Mass (m) = 150 kg - Speed (v) = 15 m/s- R (Required): - Kinetic Energy (KE)- E (Equation):[tex]KE = \frac{1}{2} m v^2[/tex]- S (Substitute): [tex]KE = \frac{1}{2} \times 150 \, \text{kg} \times (15 \, \text{m/s})^2[/tex] [tex]KE = \frac{1}{2} \times 150 \times 225[/tex][tex]KE = \frac{1}{2} \times 33750[/tex][tex]KE = 16875 \, \text{J}[/tex]- A (Answer): The Kinetic Energy of the object is [tex](16875 \: \text{J}\) (Joules)[/tex]2. Potential Energy Calculation- G (Given): - Mass (m) = 30 kg - Height (h) = 15 meters - Acceleration due to gravity (g) = 9.8 m/s² (standard value)- R (Required): - Potential Energy (PE)- E (Equation): PE = mgh - S (Substitute): [tex]PE = 30 \, \text{kg} \times 9.8 \, \text{m/s}^2 \times 15 \, \text{m}[/tex][tex]PE = 30 \times 9.8 \times 15[/tex][tex]PE = 4410 \, \text{J}[/tex]- A (Answer): The Potential Energy of the child is [tex](4410 \, \text{J}\) (Joules)[/tex]CARRY ON LEARNING!
