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Forces > Force & Motion > Flashcards

Force & Motion Flashcards

1
Q

the resistance of motion when one object rubs against another; tends to slow an object’s motion

A

friction

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2
Q

is a force of attraction that pulls together all matter; it attracts objects toward each other even if the objects do not touch; pulls all objects in universe toward each other

A

gravity

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3
Q

a push or pull

A

force

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4
Q

speed and direction of an object

A

velocity

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5
Q

a measure of how far an object moves in a certain amount of time

A

speed

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6
Q

distance divided by time

A

speed formula

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7
Q

Choose friction or gravity: You slip on a wet floor and fall down.

A

GRAVITY

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8
Q

What effect does gravity have on a person living on Earth?

A

causes a person to have weight

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9
Q

mass X acceleration

A

formula for force

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10
Q

a measurement of how much matter is in an object; will remain the same anywhere in space

A

MASS

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11
Q

the measure of the force of gravity on an object

A

WEIGHT

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12
Q

are equal in size and opposite in direction; when this occurs, there is no change in motion

A

BALANCED FORCES

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13
Q

is a kind of friction (a force that opposes motion) which occurs between air and another object

A

air resistance

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14
Q

forces applied to an object in opposite directions that are not equal in size which results in a change in motion

A

UNBALANCED FORCES

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15
Q

the measurement of change in an object’s velocity

A

ACCELERATION

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16
Q

How does the distance between objects affect the force of gravity between them?

A

If distance increases, gravity decreases.

17
Q

This causes an object to remain in place.

A

Balanced Force

18
Q

These cause an object to start moving, stop moving or change direction.

A

Unbalanced forces

19
Q

how far an object moves in a certain amount of time

A

SPEED

20
Q

THIS FORCE OPPOSES THE MOTION OF ONE OBJECT MOVING PAST ANOTHER

A

FRICTION

21
Q

the tendency of an object to RESIST a change in its state of motion

A

INERTIA

22
Q

Doubling the MASS of an object results in . . .

A

HALF THE ACCELERATION.

23
Q

If an object is accelerating, it must have . . .

A

an UNBALANCED force acting on it.

24
Q

Choose balanced or unbalanced.

A skier goes down a mountain.

A

UNBALANCED

25
Q

Choose balanced or unbalanced.

A book sits high upon a bookshelf.

A

BALANCED

Forces (3 decks)

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