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16,875 Joules

## What is the kinetic energy of an object with a mass of 1000 kilograms that is traveling at 30 meters per second?

Units: Joules (J) Page 16 Example #2: What is the Kinetic Energy of a 1,000 kg car moving at 30 m/s? KE = 450,000 J Page 17 Example #3: What is the Kinetic Energy of a 20,000 kg freight car moving at 25 m/s?

## What is the kinetic energy of a 3kg ball that is rolling 2m s?

PE= Fwh = (72 m) (966 N) = 69552 Joules 7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second? KE= ½ m v2 = ½ (3kg) (2 m/s)2 = 6 Joules 8.

## At what letter does the ball have the greatest kinetic energy?

As the ball falls from C to E, potential energy is converted to kinetic energy. The velocity of the ball increases as it falls, which means that the ball attains its greatest velocity, and thus its greatest kinetic energy, at E. 19.

## Which position has the greatest potential energy?

Higher objects (with further to fall) have greater potential energy. The heaviest of 2 objects at the same height has the greatest gravitational potential energy.

## At which position A or B is the potential energy?

Energy = potential energy + kinetic energy as other forms of energy are neglected. Clearly , position A is at a higher position from the ground , so it has more potential energy. As the energy is conserved , the kinetic energy at A must have decreased making the total energy the same as that during B.

## What is the maximum potential energy?

At an object’s maximum height, kinetic energy is zero/ maximum while the potential energy is zero/ maximum. At an object’s lowest point, kinetic energy is zero/ maximum while potential energy is zero / maximum. 4. Mass affects/does not affect the amount of total energy.

## At which point S is the potential energy a minimum?

At an equilibrium point, the slope is zero and is a stable (unstable) equilibrium for a potential energy minimum (maximum).

## At what position pendulum acquires the maximum kinetic energy?

The bob of a pendulum has maximum kinetic energy at the mean position. The total energy at any point remains constant. At the lowest point, Potential energy is zero. So the entire energy is in form of K.E.. Hence K.E. is maximum at the lowest (mean) point.

## What is a potential energy diagram?

The energy changes that occur during a chemical reaction can be shown in a diagram called a potential energy diagram, or sometimes called a reaction progress curve. A potential energy diagram shows the change in potential energy of a system as reactants are converted into products.

## What is the purpose of a potential energy diagram?

The potential energy diagram can illustrate the mechanism for a reaction by showing each elementary step of the reaction with distinct activation energy (see Figure below ). Figure 1. The potential energy diagram shows an activation energy peak for each of the elementary steps of the reaction.

## What is enthalpy diagram?

An enthalpy diagram plots information about a chemical reaction such as the starting energy level, how much energy needs to be added to activate the reaction, and the ending energy. An enthalpy diagram is graphed with the enthalpy on the y-axis and the time, or reaction progress, on the x-axis.

## How can you tell a reaction is endothermic?

So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic. If the products side has a larger enthalpy, the reaction is endothermic. You may wonder why endothermic reactions, which soak up energy or enthalpy from the environment, even happen.

## Is breaking bonds exothermic?

Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process. Whether a reaction is endothermic or exothermic depends on the difference between the energy needed to break bonds and the energy released when new bonds form.

## How do you calculate the overall energy change?

To calculate an energy change for a reaction:

1. add together the bond energies for all the bonds in the reactants – this is the ‘energy in’
2. add together the bond energies for all the bonds in the products – this is the ‘energy out’
3. energy change = energy in – energy out.

2021-05-18