Chap. 18 Weiser
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| The purpose of a machine is to: | make work easier
🗑
|
||||
| Most machines make work easier by trading force for distance means: | the object will decrease as the length of the ramp increases but the effort must be exerted through a longer distance
🗑
|
||||
| If you fill a bottle with sand and place it in water the bottle will: | sink only when the buoyant force is less than the weight of the bottle and its contents
🗑
|
||||
| The _____________ is the balance point of a lever. | fulcrum
🗑
|
||||
| ____________is the push or pull that causes changes in motion. | Force
🗑
|
||||
| A bicycle is or is not a simple machine? | is not
🗑
|
||||
| The word that best describes the force on a moving baseball is: | unbalanced
🗑
|
||||
| A ___________ ________________is a device, made of only a few parts, that makes work easier. | simple machine
🗑
|
||||
| When a football is thrown 20 yards __________ is done. | work
🗑
|
||||
| A force that opposes motion is called_____________. | friction
🗑
|
||||
| The buoyant force of a sealed, plastic bottle in water would be ________ ____or _______________than the bottle's weight. | equal to or greater
🗑
|
||||
| The force two arm wrestlers exert on each other's hands is: | balanced
🗑
|
||||
| When you use a bar magnet to pick up paper clips the force operating is: | magnetism
🗑
|
||||
| Pushing down on the free end of a lever to raise a load is an example of how the _________applied (effort) is _________than the load. The lever ________the amount of force needed to lift the load. | force less reduces
🗑
|
||||
| An ______________ ____________is a ramp or sloping surface. | inclined plane
🗑
|
||||
| The force of attraction that Earth exerts on objects is____________. | gravity
🗑
|
||||
| A pulley raising a block makes the job easier because although the pulley doesn't _________________effort force, it does change its ______________________. It is _____________to pull | multiply direction
🗑
|
||||
| A wedge, a chisel, and an axe are all what types of machines? | inclined plane
🗑
|
||||
| A _____________is a bar that makes it easier to move things. | lever
🗑
|
||||
| If two boys apply a force of 50 N. to a box at the same time and a 3rd boy pushes on the box at 50 N, what is the net force on the box? | 50 N, to the left
🗑
|
||||
| A wheel with a groove for a rope is called a ____________. | pulley
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Mrs. Logan
Popular Science sets