lesson 3 gravity and weight Flashcards

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1
Q

the mass of an object tells us what

A

how much matter the object has in it

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2
Q

what is the unit for mass

A

kilograms (kg)

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3
Q

mass is a scalar quantity because it has what

A

no direction

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4
Q

the mass of an object does not on what

A

where the object is

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5
Q

the weight of an object is what

A

the force acting on it due to gravity

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6
Q

the unit of weight is what

A

newtons (N)

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7
Q

the weight of an object does what

A

depend on where it is

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8
Q

at the surface of the earth, the gravitational force is what

A

9.8 N/kg

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9
Q

gravitational field strength has what symbol

A

g

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10
Q

the gravitational field strength is what

A

a measure of the force of gravity in a particular location

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11
Q

objects on the surface of the earth experience a force of

A

9.8N for every kg of their mass

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12
Q

what is the equation for weight

A

weight=mass x gravitational field strength

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13
Q

what relationship does the weight of an object have with the mass

A

its directly proportional

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14
Q

what can we use to determine an objects weight

A

calibrated speed-balancer

(newton meter)

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15
Q

the gravitational field strength depends on what

A

where you are

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16
Q

the gravitational field strength of the moon is what

A

1.6N/kg

17
Q

the weight of an object (the force due to gravity)

can be what

A

considered to act at a single point

scientists call the point, the centre of mass