Motion
Motion is described by an objects __________ and ________.
What is direction and speed?
Forces acting in opposite, equal directions
What are balanced forces?
A train leaves Penn Station, traveling 850km/hr north in 4 hours.
What is distance/displacement?
212.5km due north
An attractive force between objects
What is gravity?
Simple machines are used to make _____ easier and use less _____.
What is work and force?
Examples of directions are...
What is...Up, Down, Forward, Backwards, North, East, South, and West?
The net force is positive or negative in the direction of the ____________ force
What is greater?
A car moving west speeds up from 17m/s to 47m/s in 2s.
What is acceleration?
15m/s2
On Earth, gravity pulls all objects toward it with an acceleration of
What is 9.8m/s2 (g)
The object being lifted or moved by a simple machine is the _____.
What is load?
Speed equals ________ _________ divided by ________ spent moving.
What is distance traveled, time?
What force allowed Giselle to throw a tennis ball make it pause mid air, and return to her?
What is gravity?
Fp= 600N (positive direction)
Fg= 500N (negative direction)
What is the sum of the forces?
100N (positive direction)
Two factors affected by gravitational force between objects
What is mass and distance?
The ratio of __________ force to _________ force
What is output and input?
MA=output force/input force
What is the property of matter that causes it to resist a change of its motion in either speed or direction.
What is inertia?
(Newton's 1st Law of Motion)
Force diagrams show the type, ____________, and direction of the forces acting on an object.
What is magnitude?
25kg = mass
9.8m/s2 = gravity
What is weight?
245N
245kg*m/s2
When the mass of objects increases, the gravitational force between the object
What is increases?
The six simple machines
What is an incline plane, lever, pulley, wedge, screw, and wheel and axle?
____________ is how far an object travels; while ____________ is how far an object is from where it started.
What is distance and displacement?
What is a push, or pull that causes an object to move, stop, or change speed or direction.
What is a force?
a=7.3m/s2
m= 4.5kg
What is force?
32.85N or 33N
When the distance between objects ____________, the gravitational force between the objects ___________
What is decrease and increase?
___________ ___________ is a calculation that lets you know by how much a machine can make work easier
What is mechanical advantage?