Work
What is work?
Applying a force to move or change the direction of an object.
A crane uses an average force of 5,230 N to lift a generator 45 m. How much work does the crane do on the generator?
23,530
what is a simple machine?
What is a mechanical advantage?
When you use a simple machine, you apply a force to the machine
What is a lever
a simple machine made of a rigid beam and a fulcrum.
What is the formula for work?
W=fxd
Find the work done if a body move through a distance of 5 m in the direction of applied force of 100 N.
500
What are the 3 ways that machines can help to perform work?
1. Increasing the distance through which the force is applied
2. Multiplication of the applied force
3. Increasing the speed of the energy applied
What is the mechanical advantage formula?
Mechanical advantage=Effort Distance/resistance distance
What is a pulley?
a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim.
What is work measured in?
Joules (J)
Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?
200
what are the 6 types of simple machines?
Inclined plane,wedge,screw,wheel and axle,lever,pulley.
What is effort (input) force?
What is a wheel and axle?
a simple machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
What does work equal when the object is not moving?
0 (Zero)
How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200N?
4000
Why are they called simple machines?
he simplest mechanisms known that can use leverage (or mechanical advantage) to increase force.
What is resistance (output) Force?
found between the fulcrum and input (effort) force.
What is an Inclined plane?
a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load.
When an object pushes or pulls on a second object and causes it to move what is done?
Work is performed.
Alex applies 350 N of force to move his stalled car 40 m, how much work did Alex do?
14000
How do you make a simple machine?
Equation:
MA=10/5
MA=2
What is a wedge?
a triangular shaped tool, and is a portable inclined plane, and one of the six simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place.