Physics flash cards

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1
Q

What is gravity?

A

A force that affects two objects with mass.

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2
Q

What is a unit of force?

A

Push or pull;described by strength

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3
Q

What does unbalanced force equal?

A

No motion

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4
Q

What are factors of Gravity?

A

Mass and distance.

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5
Q

What is distance?

A

The length between two points

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6
Q

What is weight?

A

The gravitational force exerted on an objects mass

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7
Q

What is free fall?

A

Only gravity acting on a falling object

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8
Q

What is air resistance?

A

It’s a type of fluid friction as an object falls through the air

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9
Q

What is projectile?

A

an object that is thrown

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10
Q

What is friction?

A

The force that two objects exert on each other when they rub against each other.

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11
Q

What is static friction?

A

Friction on objects that are not moving

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12
Q

What is rolling friction?

A

Friction when an object rolls across a surface.

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13
Q

What is fluid friction?

A

Friction when an objects goes through a fluid.

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14
Q

How is friction helpful?

A

It can stop things and help them move smoother

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15
Q

How is friction Harmful?

A

it can wear out parts

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16
Q

What is Newtons first law?

A

Law of Inertia.

17
Q

What is Inertia?

A

the tendency of an object ro resist a change in motion.

18
Q

What factor affects Inertia?

A

Mass

19
Q

What does Newtons first law state?

A

an
object at rest will remain at rest and an
object moving at a constant velocity will
continue moving at a constant velocity,
unless it is acted upon by an unbalanced
force. Gravity and friction are unbalanced
forces.

20
Q

What is Newtons second law?

A

acceleration

21
Q

What is acceleration?

A

The speed increasing or decreasing or direction changing

22
Q

What is terminal velocity?

A

maximum velocity of a free falling object occurs when the force of air resistance equals the weight of the object.

23
Q

What does Newtons second law state?

A

acceleration
depends on the object’s mass and the force
acting on the object.

24
Q

What is Newtons 3rd law?

A

Law of motion

25
Q

What is the pair in motion?

A

Action/reaction

26
Q

What does Newtons 3rd law state?

A

for every
action there is an equal but opposite reaction.

27
Q

What is Momentum?

A

A measure or quantity of motion

28
Q

What is the law of conservation of momentum?

A

for every
action there is an equal but opposite reaction.

29
Q

What is the formula for motion?

A

F = m x a