The table shows the mechanical energy and velocity of a rock that was thrown four times. the rock has a mass of 2.4 kg. trial mechanical energy velocity 1 32 7.0 2 34 2.0 3 35 6.0 4 31 3.0 during which trial was the rock the highest above the ground? a. 1 b. 2 c. 3 d. 4

In each case we will find the Kinetic energy and find its difference with total mechanical energy

As we know that

Potential Energy = Mechanical Energy - Kinetic Energy

so if object will have more potential energy then it will have more height

now for potential energy in each case

1. Kinetic energy is given as

now PE = 32 - 58.8 = -26.8 J[/tex]

2. Kinetic energy is given as

now PE = 34 - 4.8 = 29.2 J[/tex]

3. Kinetic energy is given as

now PE = 35 - 43.2 = -8.2 J[/tex]

4. Kinetic energy is given as

now PE = 31 - 10.8 = 20.2 J[/tex]

So here maximum potential energy in case 2

So maximum height will be in case 2

not moving. pos accel,

because if the tool that you are using is not balanced it there would be false mass.