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Science > Forces > Flashcards

Forces Flashcards

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0
Q

Unbalanced forces

A

Cause an object to move, to stop moving, or to change directions

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1
Q

Force-

A

A push or pull

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2
Q

Net force

A

The overall force of all forces added together

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3
Q

Balanced forces

A

Equal forces acting on an object in opposite directions; it won’t change the objects motion; causes zero net force

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4
Q

Inertia-

A

The tendency of an object to resist change

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5
Q

Newton’s first law of motion-

A

An object at rest will stay at rest and a moving object will continue to move until acted on by a force

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6
Q

The greater the mass of an object the greater the __________

A

Inertia

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7
Q

An unbalanced force acting on an object will change the objects _____________

A

Motion

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8
Q

Mass-

A

The amount of matter in an object

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9
Q

The net force on an object is equal to the product of its ___________

A

Acceleration and mass

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10
Q

Newtons 2nd law of motion

A

The net force on an object is equal to the product of its acceleration and mass

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11
Q

What’s the formula for force

A

F=MxA

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12
Q

What’s the formula for acceleration

A

A= F/M

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13
Q

What’s the formula for mass

A

M= F/A

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14
Q

If you decrease the force on an object it’s acceleration __________

A

Decreases

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15
Q

If you increase the mass on an object it’s acceleration _________

A

Decreases

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16
Q

Newton-

A

Kgm
________
S2

17
Q

Friction

A

The force that one surface exerts on another when the two rub against each other

18
Q

The strength the force of friction depends on two factors __________

A

The type of surfaces involved and how hard the surfaces push together

19
Q

Sliding friction-

A

When solid surfaces slide over each other

20
Q

Rolling friction-

A

When an object rolls over a surface

21
Q

Fluid friction-

A

The friction that occurs when an object moves through a fluid

22
Q

Gravity-

A

The forms that pulls objects toward earth

23
Q

Free fall-

A

Occurs when only force acting on falling object is gravity

24
Q

Acceleration due to gravity is ________

A

9.8 m/s/s

25
Q

All objects in free fall accelerate at_________ rate

A

The same

26
Q

Projectile motion-

A

When an object is thrown horizontally

27
Q

Air resistance-

A

Objects falling through air have air resistance, a type of fluid friction

28
Q

Terminal velocity-

A

When a falling object can fall no faster due to air resistance that’s equal to gravitational pull.

29
Q

Weight-

A

Force of gravity on an object

30
Q

Universal gravitation-

A

Force of gravity acts between all objects

31
Q

Gravity depends on…………….

A

Size & distance, bigger objects have more gravitational pull

32
Q

The law of universal gravitation-

A

States that the force of gravity acts between all objects in the universe

33
Q

Newtons 3rd law-

A

States that if one object exerts a force on another object then the second object exerts a force of equal strengthen in the opposite direction on the first object.

34
Q

Momentum -

A

The product of its mass and it’s velocity

35
Q

What’s the formula for momentum?

A

Mo= M x V

36
Q

What’s the unit for measuring momentum

A

Kgm
_______
S

37
Q

The more momentum an object has the ______

A

Harder it is to stop

38
Q

More mass makes an object have_______

A

More momentum

39
Q

The more velocity an object has _____________

A

The more momentum it will have

40
Q

Law of conservation of momentum

A

States that this total momentum of the objects that interact does not change

41
Q

The total momentum of any group of objects remains the same unless_________

A

Outside forces act on the objects

Science (12 decks)

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