LR257.0.1: Introduction to Formative

There are two general types of energy: kinetic and potential energy. All moving objects have kinetic energy. Kinetic energy is energy due to motion.

The amount of kinetic energy that an object has is dependent on two factors: the object’s speed and mass. The more speed an object has, the greater its kinetic energy is. The more mass an object has, the greater its kinetic energy is. Kinetic energy also decreases when an object’s speed or mass decreases.

For example, a sailboat has more speed and mass than a swimmer does. The sailboat has more kinetic energy than the swimmer. On the other hand, a speedboat has more kinetic energy than a sailboat because it has a much greater speed.

Knowing the velocity and mass of an object is essential in calculating the object’s kinetic energy. The following equation is used to calculate kinetic energy:

1. Kinetic energy is energy due to motion.

2. Kinetic energy is affected by speed and mass.

•Kinetic energy increases as speed increases.

•Kinetic energy increases as mass increases.

3. Kinetic energy can be calculated by using an equation:

KE =/12 × m × v²

Another general type of energy is potential energy. Potential energy is the energy an object has due to its position, condition, or chemical composition. There are many forms of potential energy that store energy in different ways. In fact, all matter has potential energy of some kind. When lifting a yo-yo, for example, some energy is transferred to the yo-yo. The energy that is transferred to the yo-yo is stored and can be used later if the yo-yo is released.

Objects often have both potential and kinetic energy. Everything has some potential energy, but not everything has kinetic energy. Click the buttons to explore how an object can have both potential and kinetic energy.

1. When the cars move up the rollercoaster, their height increases, and their speed decreases. The decrease in kinetic energy is equal to the increase in potential energy.

2. At the top of the rollercoaster, the cars have potential energy because gravity can pull them downward.

3. As the cars move towards the ground, the decrease in their potential energy is equal to the increase in their kinetic energy. Their kinetic energy increases because their speed increases. Their potential energy decreases because their distance from the ground decreases.

4. At the bottom of the rollercoaster, the cars kinetic energy is high because they are going the fastest. Their potential energy is low because they are closer to the ground than at any other point on the rollercoaster.

Another form of potential energy is elastic potential energy, which is energy that is stored when materials stretch or compress. Rubber bands and springs are examples of objects that have elastic potential energy.

1. There are two general types of energy that an object can have: kinetic energy and potential energy.

2. Kinetic energy is energy that is in motion.

3. Kinetic energy is directly affected by speed and mass.

• Kinetic energy increases as speed increases.

• Kinetic energy increases as mass increases.

• Kinetic energy= 1/2 x m x v²

4. Potential energy is the energy an object has due to its position, condition, or chemical composition. It is stored energy.

5. One type of potential energy is gravitational potential energy, which is related to an object’s height.

• gravitational potential energy = mgh

6. Another type of potential energy is elastic potential energy, which is stored when materials are stretched or compressed.