motion and forces

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what do forces change

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this contains all you need to know about forces and motion and how certain circumstances may effect these <3

16 Terms

1

what do forces change

  1. speed of a object

  2. direction of an object

  3. the size of an object

  4. the shape of an object

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2

what is the measurement of a force

newtons (N) and is measured with a force meter or spring balance

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3

why are forces vector

because it has mass and has direction

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4

what happens when forces are balanced

the resultant force will be zero, when forces are not balanced there will be a resultant force

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5

what is Newtons 1st law?

it states that if the forces of an object are balanced they will carry on in the same state of motion

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6

what is friction

this is force that opposes motion

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7

what is Newtons 2nd law?

if forces are not balanced then the resultant force will cause the motion of the object to change

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8

the equation for calculating force

F= m*a

force = mass * acceleration

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9

the formula for force

f = mv- mu/ t

force = mass of final velocity - mass of initial velocity divided by time

mu= mass * initial velocity

mv = mass * final velocity

force = change in speed/time

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10

what energy does springs store

elastic potential energy when stretched or squashed

force = extension

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11

what is Hooke’s law

the extension of an elastic object is directly proportional to the force applied to it, can be shown in the equation:

F=Ke

f= force

K= the spring constant

e= extension of the object

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12

what is the limit of proportionality

the point at which the load and extension are no longer proportional

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13

what is a moment of force

the moment of force is the measure of the turning effect

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14

the equation of moments of force

moment = force * distance

Nm = F * d

measured in newton meters

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15

what is the definition of a force

it is a result of a push or pull on an object

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16

what is the formula for density

density= mass/volume d=m/v

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