Definitions Flashcards
1
Q
What is the ability to make things move ?
A
Mechanical energy
2
Q
What is a fixed unmoving object or location?
A
A reference point
3
Q
What is the change of an objects position?
A
Motion
4
Q
What is determined by its mass and velocity?
A
Momentum
5
Q
The resistance to change in motion is called
A
Inertia
6
Q
Which unit is used to measure work
A
Joule
7
Q
The decrease in effort that is needed to move an object is called
A
Mechanical advantage
8
Q
Which machine is a bar that turns on a point?
A
Lever
9
Q
What kind of machine is a screw?
A
An inclined plane wound around a cylinder or a cone
10
Q
What does a wedge consist of?
A
Two inclined planes placed back to back
11
Q
Which simple machine works easier by either changing the direction of the force or by reducing the amount of force needed to move an object
A
Pulley
