potential
energy
energy
What happens to an object’s potential energy if you lift it higher? Does it increase, decrease, or stay the same?
Increase
If a car with a mass of 1000 kg is traveling at a speed of 20 m/s, what is its kinetic energy?
200,000J
What are the two main types of mechanical energy?
Kinetic energy, and potential energy.
How old is Maria?
12
How old is Victoria?
12
What is the equation for PE?
PE=M*G*H
What is the equation for KE
KE=1/2mv2
What is the formula for mechanical energy?
KE+PE=E
What is Maria‘s favorite color?
Navy blue
What is Victoria’s favorite color?
Blue
A 2 kg ball is lifted to a height of 5 meters. After being released, the ball reaches a maximum speed of 10 m/s just before hitting the ground. What is the gravitational potential energy of the ball at the top?
PE=2×9.8×5=98J or 100J
A 1500 kg car is traveling at a velocity of 20 m/s. What is the car's kinetic energy? Additionally, if the car's velocity is doubled, what happens to the kinetic energy?
300,000J
If an object is moving up in the air and slows down, what happens to its kinetic energy and potential energy?
Kinetic energy decreases because the object is slowing down. Potential energy increases because the object is getting higher. In a closed system with no friction, the total mechanical energy (kinetic + potential) stays constant, but the energy just shifts between kinetic and potential forms.
When is Maria‘s birthday?
November 9th 2012
When is Victoria’s birthday?
May 29th 2012
A 3 kg object is dropped from a height of 12 meters. Upon reaching the ground, the object has a speed of 15 m/s. What is the gravitational potential energy of the object when it is at the top?
PE=3×117.6=352.8J
A 0.5 kg soccer ball is kicked with a speed of 15 m/s. What is the kinetic energy of the soccer ball?
56.25J
A roller coaster starts from rest at the top of a hill 50 meters high. Assuming no friction or air resistance, what is the speed of the roller coaster at the bottom of the hill?
(Hint: Use conservation of mechanical energy!)
approximately 31.3 m/s.
Does Maria have or had any pet(s)? If so what were kind?
2 parrots, a fish
Does Victoria have or had any pet(s)? If so what kind?
Cat fish and a fish
A 0.5 kg ball is lifted to a height of 10 meters. What is its potential energy at that height?
49J
A 1200 kg car is moving up a hill with an initial velocity of 18 m/s. The car reaches a height of 50 meters. What is the car's gravitational potential energy at the top of the hill?
588,000J
A 2-kg object is launched vertically upwards with an initial velocity of 20 m/s. Calculate the maximum height the object will reach. Assume no air resistance.
This question involves both kinetic energy and potential energy, and you'll need to use the conservation of mechanical energy to solve it.
approximately 20.4 meters.
If Maria has or had a pet what was it’s name(s)?
Skylar, Mango, and nemo
If Victoria has or had a pet what was it’s name?
Fatty