Is it Work?
The transfer of energy that occurs when a force makes an object move in the same direction.
What is Work?
The SI unit used to measure work.
What is Joules?
This term describes the "rate" at which work is done.
What is power?
A device that makes work easier.
What is a machine?
A machine made of two or more simple machines.
What is a compound machine?
Between a boy pushing a wall that doesn't move and a girl kicking a soccer ball, this one is doing work.
What is the girl kicking the ball?
A boy lifts a 30 N toy car 2 meters high; he has done this much work.
What is 60J?
This is the SI unit for Power.
What is Watt?
A flagpole and window blinds are common examples of this simple machine.
What is a pulley?
A wheelbarrow combines a wheel and axle with this other simple machine.
What is a lever?
True or False: Carrying a heavy box horizontally across a room is considered "Work" in physics.
What is false?
Note: The force is upward but the motion is horizontal.
Calculate the work: A force of 150 N moves a crate 8 meters.
What is 1,200J?
If the time taken to complete a project decreases, the power required does this.
What is increases?
An ax used for chopping firewood is an example of this.
What is a wedge?
On a bicycle, the brake handle acts as this type of simple machine.
What is a lever?
To do work on an object, the object must move in this relation to the direction of the force.
What is the same direction?
To find work, you must multiply these two variables.
What are force and distance?
A weightlifter applies 500 N of force to lift a bar 2 m in 10 seconds. This is his power output.
What is 100W?
This is how a fixed pulley makes work "easier".
What is changing the direction of the force?
Scissors are a compound machine consisting of two levers and two of these.
What is a wedge?
A pitcher holds a ball in his glove for 5 seconds. This is the reason no work is being done.
What is no movement?
If you move a 10 kg object 5 meters at an acceleration of 2m/s^2, this is the total work done.
What is 100J?
A student running up stairs has more power than a student walking because the work is done in less of this.
What is time?
When you decrease the effort force needed for a machine, you must also do this to distance.
What is increase the distance?
In a bicycle, the chain and gears act as this type of simple machine system.
What is a pulley?