Ch.1 Speed/accel
a measure of how fast something moves throughout a time period
What is speed
A push or pull
The force exerted on objects because of mass
What is gravity
The definition of work
what is when a force causes an object to move in the direction of the force applied
The pivot of a lever
Fulcrum
A quantity that has both size and direction
What is vector
The overall force acting on an object
What is net force
The force that keeps earth in orbit
What is gravity
The formula for work
What is w=f x d
(work= force times distance)
An inclined plane wrapped around a pole.
What is a screw?
An objects location
position
Pictures that show the size and direction acting on an object
What is free body diagram
A person drops a bowling ball and a feather in a vacuum. What lands first?
They both land at the same time.
Give a example of someone NOT doing work
A person tries to push a box but can't
Mechanical advantage less than one
increases distance
? =d/t
speed
Forces that are equal in size and cancel each other out
What are balanced forces
The strongest type of friction
What is static friction
The formula for power
P= w/d
A wedge and lever
What are scissors?
The initial velocity is 5, The final velocity is 11
It took 3 seconds (time) Acceleration=?
A= 2 m/s/s
Solve for force. A car accelerates at 10 m/s2 and weighs 12kg. What is the force?
120N
The weakest friction
What is fluid friction
Solve this, A person pushes a toy car weighing 5N 2 meters. What is the work done?
W= f x d
10 joules
A grooved wheel and axle with a rope
What is pulley?