Work and Force

choose all of which force can do (hint: there are 4 things which force can do here)

• it can make things move.

• The push or pull needed to move an object

• It can increase the speed of moving object.

• It can stop or slowdown the movement of a body.

• It can change the direction of a moving object

what is force ?

• work

• The push or pull needed to move an object

• the type of force which help us to slowdown the movement

• none of the above

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

when is work done?

• work is done when it can make things move.

• The force which pulls things back to the ground

• Work is done when an object or a body moves through a distance , or change its shape

• the work is done by type of force which help us to slowdown the movement of an object

Tags

NGSS.MS-PS3-5

when is a work not done?

• work is not done when it can make things move.

• The force which pulls things back to the ground

• Work is not done when an object or a body moves through a distance , or change its shape

• When there is no movement

Work occurs whenever something is moved and an object is put into motion. The motion of an object is described with three things: position, direction and speed. Forces come into play with work because they push and pull objects. All forces have size and direction. Some, like the pull of gravity toward a black hole, are immense, while others, like the push of an ant on a breadcrumb, are very small. Work is possible because all objects have mechanical energy, including potential (energy based on position) and kinetic (energy of motion) energy. Mechanical energy is transferred from one object to another by pushing or pulling it. How fast these objects move depends on the position they began in and how much force was applied to them. Which of the following is an example of a situation where work occurs?

• a glass of water sitting on the counter

• a leaf resting on a rock

• a student sitting at a desk

• a baseball soaring through the air

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

what is balanced force ?

• work

• The push or pull needed to move an object

• the two forces acting in opposite directions on an object, and equal in size.

• none of the above

what is unbalanced force ?

• forces that cause a change in the motion of an object

• The push or pull needed to move an object

• the two forces acting in opposite directions on an object, and equal in size.

• none of the above

Tags

NGSS.MS-PS2-2

Work is

• the change in position of an object.

• the energy exchanged by objects

• the amount of energy that is transfer to an object.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Force is

• the unit used to calculate work.

• the energy exchanged by objects

• a body or object that receives energy

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Joule is

• the energy stored in matter

• a body or object that transfer energy

• the unit used to calculate work

Tags

NGSS.MS-PS3-5