7/8 Science: Balanced and Unbalanced Forces

A force is a ​ (a)   or a ​ (b)   .

• push
• pull
• lift
• slide
• shove

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Forces may or may not cause ______?

• rest
• movement

• stillness
• inactivity

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NGSS.3-PS2-1

Categized the following.

Groups:

(a) Balanced Forces

,

(b) Unbalanced Forces

,

(c) Net Force

• Measured in Newtons (N)

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

• Causes objects to change position, direction or speed.

• The overall or combination of all forces acting on a object.

• Continues to move at the same speed and in the same direction.

• When two forces that are unequal in size and opposite in direction.

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With balanced forces the objects stays ​ (a)   or continues to move at the same​ (b)   and in the same ​ (c)   .

• still
• speed
• direction
• going
• motion
• view

Tags

NGSS.MS-PS2-2

Unbalanced forces cause an object to change?

• position

• direction

• speed

• altitude

Tags

NGSS.MS-PS2-2

A skier going down a hill is an unbalanced force so it will _______

• change direction

• change speed

• change direction

• change altitude

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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the force that causes a moving object to slow down when it touches another object

• momentum
• inertia
• gravity
• friction

one object rubbing against another

• slippery
• friction
• smooth
• static

is a way of measuring how quickly something is moving or being done

• velocity
• distance
• speed
• time

Tags

NGSS.MS-PS3-1

a force that is applied to an object by a person or another object

• acceleration force

• gravitation force

• velocity force

• applied force