Vocabulary
What is it called when an object changes position
Motion
The tendency of an object to resist a change in motion
Inertia
What are the 3 factors that friction depends on
1. The rougher the surface the greater the friction
2. The greater the force pushing the two objects together the greater the friction
3. The greater the surface area of the two objects touching the greater the friction
An elevator at a museum can travel 210m upwards in 35s. What is the evaluators velocity
6 m/s upwards
What is it called when the distance of an object travels per unit of time
speed
A net force acting on an object causes the abject to accelerate in the direction of the net force
Newtons 2 law
Force between two surfaces that are not moving past each other
Static friction
You are pushing a friend on a sled you push with a force of 40n your friend and the sled together have a mass of 80kg ignoring friction what is the acceleration of your friend on the sled
A= 0.5 m/s
Resistance to motion when two objects are in contact with one another
Friction
Every action has an equal and opposite reaction
Newtons 3rd law
Force between two surfaces that are sliding past each other
Sliding friction
Sound travels at 343 m/s through dry air. if lighting bolt strikes the ground 2km away from you how long will it take for the sound to reach you?
T=5.83s
when traveling through the air what kind of resistance does the object feel
Air resistance
What is the name for when a falling object will reach
maximum velocity
force between a rolling object and the surface it rolls on
Rolling friction
What is the momentum of a car with mass of 1300kg traveling at a speed of 28m/s
P=36,400 kgm/s
The speed that shows up on you speedometer
Instantaneous speed
Which law has two masses exert an attractive force on each other
Law of universal gravitation
What formula is used to find the displacement of motion
A^2+b^2=c^2