Determine whether the objects in the following problems have kinetic or potential energy. Then choose the correct formula to use: KE=(1)/(2)mv^2 PE=mgh 1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s The ball has __ energy. Calculate it. G s U S E

Question

Determine whether the objects in the following problems have kinetic or potential energy. Then choose the correct formula to use: KE=(1)/(2)mv^2 PE=mgh 1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s The ball has __ energy. Calculate it. G s U S E

Answer 1

### The ball has a kinetic energy of 945 Joules.

Answer 2

## Step 1: Identify the type of energyThe volleyball is in motion as it leaves the hand, so it has kinetic energy.## Step 2: Use the kinetic energy formulaThe kinetic energy (KE) can be calculated using the formula:

Where

is the mass and

is the velocity.## Step 3: Plug in the valuesSubstitute

and

:

## Step 4: Calculate the kinetic energyPerform the calculations:

Question

Determine whether the objects in the following problems have kinetic or potential energy. Then choose the correct formula to use: KE=(1)/(2)mv^2 PE=mgh 1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s The ball has __ energy. Calculate it. G s U S E

Answer

Answer

Explanation