Law of Conservational of Energy
The area where kinetic and potential energy are equal
The Midpoint
Joe's clothes were dragging approximately 12.64 m from the front door to the car at a constant speed of .43 m/s. He does this with a horizontal force of 87.0 N. How much works does he do to over come friction??
1100 J
If John does 5.1 J of work to move his car by hand a distance of 2.3 m and all of this is done in 8 s, how much power has been exerted?
.64 W
What is at its highest just before?
Hitting the ground
Potential energy forumla
Ug= mgy Ug=mgh
The Law of Conservation of Energy definition
Total energy of an isolated system remains equal.
w=(f cosĪ)
A 60 watt bulb runs for 5 seconds. How much energy does it use?
300 J
Kinetic energy definition
a compressed spring that obeys Hooke's law has a potential energy of 18 J. if the spring constant of the spring is 400 N/m, find the distance..
.3 Meters
A kickball is curving left with a mass of 6 kg at 12 m/s towards a player moving to the right with a mass of 8 kg at 10 m/s. When they collide, their new velocity is 5 m/s. What is the amount of thermal energy that is lost to this collision??
700 J
If SpongeBob does 5.1 J of work to move his fryer a distance of 2.3 m, how much power did he have to exert??
2.2 N
Mendy was rushing to her gate so she dragged her suitcase 12.64 m from the bathroom door to the gate at a constant speed of .43 m/s. she does this with a horizontal force of 87.0 N. If he does all of this within 17 s, how much power has she put out?
65 W
A 2.3 kg mass attached to a horizontal mass-less trampoline with spring constant 54 N/m, is released 0.42 m from its equilibrium position. What is the mass' speed as it passes through its equilibrium position?
2 m/s
When the potential energy is at its lowest
the energy that is stored in food and is the same energy of a molecular bond.
Chemical energy
how much work was done if an object is pulled at an angle of 47 degrees along a 6 m path with a force of 13 N.
53 J
A box is pushed down on a 30 N floor for 10 minutes. how much power is used?
A 4 kg bullet is n a 5 m ledge, if the bullet pushed off, how much kinetic energy will it have just before hitting the ground?
200 J
a rolling mud ball has 18 J of kinetic energy and is rolling 3 m/s. find its mass.
4 kg
a 25 kg ball is kicked into the air, traveling 10 m/s. calculate how high it travels
5 meters
a bowling ball has 18 J of kinetic energy and is rolling 3 m/s. find its mass.
4 KG
Sebastian and Joe are having a competition, they both can lift 75 kg weights 3.5 m off of the ground. Sebastian lifts his weight in 1.5 s and Joe lifts his weight in 2.4 s. Which person uses more power?
Sebastian
k = 100 J v = 2 m/s What is the object's mass?
50 kg
which has more potential energy plane with 500 people or a plane with 1000 people
500 people plane