4 - Motion
It is a variable that gives location relative to an origin.
Position
9.8 newtons
Inertia of an object is related to its [ ].
Units used to measure Energy.
Joules
Units used to measure Work.
The measure of the number of cycles per second.
Frequency
A unit used to measure the loudness of sound.
Decibel
Speed that does not change.
Constant Speed
Energy that increases with mass and speed.
Kinetic Energy
The equation used to find Work.
Work = Force x Distance
A unit of motion repeated over and over again.
Cycle
Sometimes occur in a concert hall because destructive interference causes some of the sound to cancel out with its own reflections.
Dead Spots
On a graph/compass, name the directions that are considered positive. (4)
North, East, Up, Right
Is a force that depends on mass and gravity.
Weight
Changes in motion come from which of the following:
Unbalance Forces
Inertia
Mass
Unbalanced Forces
Energy due to the height of an object.
Potential Energy
Work, Energy
Causes waves to spread out through small openings.
Diffraction
Ability to hear may be affected by which of the following:
Age, Loud Sounds, High Frequency Sounds
Speed is which of the following:
Calculated by distance/time
Zero for objects at rest
A measure of how quickly an objects gets from point "A" to point "B"
All of the above
The amount of force need to make a 1 kg object accelerate at 1 m/s.
1 newton
Find the acceleration of a small tractor pulling a 1,000kg cart with a net force of 2,000 N.
(2,000N)/ (1,000kg) = 2 m/s sq
Find the height you would need to lift a 1kg jug of milk to increase its potential energy by 98 joules.
Ep = mgh = 1kg x 9.8m/s2 x h
h = 98J/(1kg x 9.8m/s2) = 10m
Marvin weighs 100 Newtons and climbs a 2 m fence in 5 seconds. Find his power.
P=(W/T)=40 watts
When a wave bends as it crosses a boundary.
Refraction
Sound travels fastest through which of the following:
Air, Water, or Steel
Steel
400 m/s
980 newtons
Which of Newton's Law that states, "Every action force creates a reaction force that is equal in strength and opposite in direction."
Newton's Third Law of Motion
Find the kinetic energy of a child's ATV with a mass of 100 kg and a speed of 10 m/s.
Ek = (1/2)mv2
Ek = (1/2)(100kg)(10)2 = 5,000 Joules
A machine does 10,000 Joules of work in 100 seconds. Find the power.
100 watts
Name the three properties of waves.
Amplitude, Frequency, Speed
Multiples of the fundamental frequency of a vibrating string.
Harmonics