Download Study Guide: Conservation of Energy

Study Guide: Conservation of Energy By the end of this playlist, you will be able to: 1. Calculate the kinetic energy of a moving object. 2. Calculate the gravitational potential energy of an object at a height. 3. Calculate the elastic/spring potential energy of an object on a spring. 4. Define and give examples of conservation of energy. 5. Write basic conservation of energy equations to solve problems for unknown variables. By the end of this playlist, you should be able to define and give an example of the following terms: conservation of energy, mechanical energy, kinetic energy, gravitational potential energy, elastic potential energy, spring potential energy Objective 1: Kinetic Energy Kinetic Energy is the energy related to the _______________________ of an object. I know an object has Kinetic Energy because _____________________________________________. Kinetic Energy ​
increases​
if an object has a greater ______________________ or _____________________. Kinetic Energy ​
decreases​
if an object has less ______________________ or _____________________. The equation for Kinetic Energy is: ________________________ Practice! Use GUESS! A 500 kg car moves with a velocity of 40 m/s. What is the kinetic energy of the car? What is the kinetic energy of an 100 kg cheetah moving at 35 m/s? A 15 kg object has a kinetic energy of 3000 J. What is the speed of the object? A dog with 1500 J of kinetic energy is traveling at 10 m/s. What is the mass of the dog? Objective 2: Gravitational Potential Energy Gravitational Potential Energy is the energy related to the _____________________ of an object. I know an object has Gravitational Potential Energy because _____________________________________________. Gravitational Potential Energy ​
increases​
if an object has a greater ______________________ or _____________________. Gravitational Potential Energy ​
decreases​
if an object has less ______________________ or _____________________. The equation for Gravitational Potential Energy is: ___________________________ and g = _______________ Practice! Use GUESS! A 2 kg book is sitting 8 meters off the ground. How much gravitational potential energy does it have? A 0.5 kg apple is lifted 1.5 meters. How much potential energy did the apple gain? A 50 kg object has a gravitational potential energy of 2500 J. What is the height of the object? An object with 900 J of gravitational potential energy is resting on top of a 10 meter high building. What is the mass of the object? Objective 3: Elastic Potential Energy Elastic Potential Energy is the energy related to springs or rubber bands that are ___________________ or ____________________. I know an object has Elastic Potential Energy because _____________________________________________. Elastic Potential Energy ​
increases​
with a greater ______________________ or __________________________. Elastic Potential Energy ​
decreases​
with a smaller ______________________ or __________________________. The equation for Elastic Potential Energy is: ________________________ k is the _________________ Practice! Use GUESS! When a mass is placed on a spring with spring constant of 150 N/m, the spring stretches a distance of 0.5 meters. How much potential energy stored in the spring? If it takes 4 J of energy to stretch a spring 0.10 m from its unstretched length, determine the spring constant. Objective 4: Conservation of Energy Conservation of energy states that ________________________________________________________________________________ Fill in the missing energies in the diagram below: Objective 5: Solving problems with the conservation of energy A 7 kg boulder thrown upward at a speed of 5 m/s. What is the maximum height before it falls back to Earth? A 3 kg rock is dropped from a height of 15 meters. How fast is it going right before it hits the ground? 2 ​
A crossbow with a spring constant of 1500 N/m​
is compressed 0.1 meters and launches a 0.5 kg bolt. What is the speed of the bolt as it is launched?