Work and Simple Machines

Front

Which of the following is work according to the scientific definition? Options: pushing a box across the floor, standing still while holding something heavy, walking with a backpack on, all of these are considered "work"

Back

pushing a box across the floor

Front

Work only occurs when the direction of motion and direction of force are in the same direction.

Back

TRUE

Front

Can work occur without motion?

Back

FALSE

Front

Using 10 N of force to move a box 2 m, how much work?

Back

20 J

Front

Device that makes work easier by changing the size or direction of the force (or both) is called a

Back

simple machine

Front

What unit is used to measure work? Options: Joule, Meter, Newton, Gram

Back

Joule

Front

How do simple machines make work easier?

Back

changing the size or direction of the force, or both

Front

How does a ramp (inclined plane) make work easier?

Back

decreasing the size of the effort force needed, by increasing the distance.

Front

How does a single fixed pulley make work easier?

Back

It changes the direction of the force. It is easier to pull downward.

Front

Which pulley makes work easiest? Options: 1, 2, 3, they are all the same

Back

3