Energy Types & Energy Transformations
Name 4 types of energy.
What is light (radiant), sound, mechanical, chemical, nuclear, sound, electrical, gravitational, or thermal?
Water boiling in a pot of water is what type of heat transfer?
What is convection?
If you push on a crate that weighs 1700 N but the crate does not move, how much work is done?
What is no work? 0 Joules
What is another name for Newton's 1st law?
What is the law of inertia?
If no forces act on an object, what will happen to the object’s motion?
What is it will remain at rest or it will continue at a constant speed?
What is the basic energy transformation in a cell phone?
What is chemical to electrical to light/sound?
What is the plateau?
What are the 6 simple machines?
What are wedge, lever, pulley, inclined plane, wheel and axle, and screw?
What is the force on a 1500 kg elevator that is falling at 15 m/s2? And what law of Newton's is this?
What is 22,500 N and Newton's 2nd law?
F=m⋅a
True or false: If a person is moving to the right at a constant speed, then the forces acting upon them are unbalanced.
What is false?
What is the difference in kinetic energy and potential energy?
What is kinetic energy means in motion and potential energy is stored?
Out of these 3 materials: wood, metal, or plastic, which of the following would transfer heat energy the fastest and why?
What is metal because it is a conductor?
A mother pushes her baby in a stroller with a force of 30 N for a distance of 10 m. How much work does the mother do to the stroller?
What is 300 J?
W= 30 N x 10 m = 300 J
A force of 50 Newtons causes an object to accelerate from 10 m/s to a speed of 22 m/s in 4 seconds. What is the mass of the object?
What is 16.67 kg?
First calculate acceleration a=change in velo/time
then solve for mass M=F/a
A car accelerates from a standstill to 60 m/s in 10 seconds. What is the acceleration?
what is 6 m/s2?
a=change in velocity/time
What type of energy do batteries store?
What is chemical?
Do good insulators have high specific heats or low specific heats and why?
What is high specific heat because they are harder to heat up/cool down
How much work does Tim do if he pulls his 2 dogs in a wagon with a force of 25 newtons for 25 meters?
What is 625 Joules?
W= 25 N x 25 m = 625 J
What is for every action, there is an equal and opposite reaction?
What is always on the X-axis of all motion graphs? Motions Graphs are: distance-time & speed-time graphs
What is time?
If you rub your hands together to create friction, what is the energy transformation that is happening?
What is mechanical to thermal?
The specific heat of ethanol is 2.46 J/g°C. Find the heat required to raise the temperature of 193 g of ethanol from 19°C to 35°C.
What is 7596 J ?
use specific heat formula and solve for Q
If the length of the resistance arm of a lever is 20 m and the length of the effort arm is 10 m, what is the mechanical advantage of the lever?
What is 0.5?
10 m / 20 m = 0.5 ** MA has no unit of measurement
A persons that has a mass of 63 kg will weigh _______ on Earth and ________ on Venus (g = 8.87)
W=m*g
What is 617.4 N on Earth and 558.81 N on Venus?
W=m*g
Earths g= is 9.8
What does the straight flat line on a distance-time graph mean? (note to self- draw this on board)
What is stopped or at rest?