Kinetic Energy
Elastic Potential Energy
Mechanical Energy
Potential Energy
Work
100
What is the formula for kinetic energy?
KE= 1/2mv^2
100
Tell us the definition of elastic potential energy.
What is potential energy caused by something being compressed?
100
How do we calculate Mechanical energy?
What is the sum of all the energies present, KE+PE+EPE...
100
Which variables does potential energy depend on?
What is position (height), mass, and gravity?
100
Work is when a _____________ acts on an object over a distance.
What is force?
200
the __________ an object moves, the more kinetic energy it has
Faster
200
What is the formula for elastic potential energy?
What is EPE= 1/2kx2
200
What is the definition of mechanical energy?
The total energy in a system.
200
What is the definition of potential energy?
What is stored energy?
200
If a teacher pushes against a wall and she becomes exhausted has work been done?
What is no?
300
If a ball is rolling at 1 m per second and it is 2 kg. What is the Kinetic energy?
What is KE= 1?
300
Calculate the elastic potential energy of a spring compressed a distance of 0.3m against a wall with a 0.75 kg block ready to be released off the spring.
What is EPE=90 J?
300
True or False: A boy walking his dog and stopping at a stop sign is an example of mechanical energy.
What is true?
300
Which point does the cart have the most potential energy?
What is 5?
300
A hockey player exerts a constant 4.5-N on a 0.105kg hockey puck which starts from rest and slides across the ice for a distance of 0.15m. What is the work done by gravity?
What is 0 J?
400
Calculate the KE of a 5.2 kg car moving at 2.4 m/s.
What is KE=14.47 J ?
400
When a force of 120 N is applied to a spring, it causes a stretch of .0225 m. What is the spring constant?
Remember, F=kx
What is k=5333?
400
Looking at images a and b, how would you set up a problem to calculate MEi=MEf if the block is initially sliding?
What is KEi=EPEf OR mv2=kx2 ?
400
What is the potential energy of a 5 kg object sitting on a 4 foot table?
What is 200 J?
400
A sailor uses a rope to pull a 40-kg boat a distance of 30m along a dock, making a 25 degree angle with the horizontal. How much work does the sailor do on the boat if he exerts a force of 255 N on the rope?
What is W=6933 J?
500
Calculate the speed of a 5.2 kg object that possesses 26.1 J of kinetic energy.
What is V=3.61 m/s?
500
A 1.7 kg block slides on a horizontal surface until it encounters a spring with a constant of 955 N. The block mass comes to a rest after compressing the spring a distance of 0.046m. Find the initial speed of the block.
What is v=1.09 m/s?
500
Springs are oriented vertically, as shown in the above diagram. Initially, the spring is compressed 4.60 cm and has a spring constant of 955 N/m. The block, which has a mass of 1.7 kg, is at rest. When the block is released, it accelerates upward. Find the speed of the block when the spring has returned to its equilibrium position.
What is V=0.52 m/s?
500
What is Mrs. Hydrick's favorite vacation spot? Has to be specific not broad.
What is the Florida Keys?
500
A boy exerts a force of 11N at 29 degrees above the horizontal on a 6.4-kg sled. Find the work done by the boy if the sled moves 2 meters, assuming the sled starts with an initial speed of 0.5 m/s and slides horizontally without friction.
What is W=19.24 J?