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E
100
________ _________ is the energy of motion?
What is kinetic energy?
100
The amount of kinetic energy that an object contains depends upon two things: speed and ________.
What is mass?
100
In the kinetic energy and gravitational potential energy formulas what unit is mass measured in?
What is Kilograms (kg)?
100
Acceleration is measured in ___________?
What is m/s2?
100
What is the value of the acceleration due to gravity (g) that is used in the Ep calculations?
What is 9.81m/s2?
200
The main difference between a scalar and a vector is that a vector also shows ___________.
What is direction?
200
An object travels a distance of 10.0 m in 4.6 s. What is the average speed of the object?
What is 2.2m/s?
200
Mechanical energy is _____.
Em = Ek + Ep. Total energy in a system
200
The energy stored in the nucleus of an atom is known as what?
What is nuclear potential energy?
200
If it took 565 J of gravitational potential energy to carry a 12 kg box up a flight of stairs, how high is the flight of stairs?
What is 4.8m?
300
A car with a mass of 1500 kg is moving at a speed of 14 m/s. What is the kinetic energy of the car?
What is 1.5 x 105 J?
300
A car is initially travelling at a velocity of 4.2 m/s [W]. If the car accelerates at a rate of 0.86 m/s2, how long will it take the car to reach a velocity of 9.6 m/s [W]?
What is 6.3s?
300
A student on a bicycle started from a full stop and reached a velocity of 8.75 m/s in 3.8 s. What was his average acceleration?
What is 2.3m/s2?
300
You exert a force of 25 N on your textbook while lifting it a height of 1.4 m to put it on a shelf. How much work did you do on your textbook?
What is 35J?
300
A boulder rests on a ledge 36 m above a lake. If it has 2.8 x 105 J of gravitational potential energy, what is the mass of the boulder?
What is 7.9 x 102 kg?
400
An object is traveling at an average speed of 8.0 m/s. How long will it take this object to travel 30.5 m?
What is 3.8s?
400
A freight elevator with a mass of 120 kg is moving with a speed of 2.50 m/s. What is it’s kinetic energy?
What is 375J?
400
A model rocket started from the ground and reached an upward velocity of 66 m/s in 5.0 s. What was the rocket’s average acceleration?
What is 13m/s2?
400
What is the speed of a 0.155 kg billiard ball that has 12.0 J of kinetic energy?
What is 12.4 m/s ?
400
What is the relation between Ek and Ep with falling objects?
What is Ep=Ek?
500
Alex walks 1.4 km west from the school. Kendra walks 0.45 km east. What is the displacement from Alex to Kendra?
What is 1.9m E ?
500
A kerosene lantern uses 984 J of chemical potential energy and produces 75 J of light energy. How efficient is the lantern in transforming chemical potential energy into light?
What is 7.6%
500
two Laws of Thermodynamics
What is energy can not be created or destroyed only converted AND energy conversions are not 100% efficient?
500
Draw a distance time graph that shows an object with uniform motion.
500
Draw a speed time graph that shows uniform motion.
