1446942
Questão 1
Questão
Mass is a measure of the force of gravity acting on an object while weight is the measure of the inertia of an object.
Responda
- True
- False
Questão 2
Questão
Force =
Responda
-
mass x velocity
-
acceleration x velocity
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mass x acceleration
-
43x 21N
Questão 3
Questão
Rolling friction is less than static friction, which is more that sliding friciton
Responda
- True
- False
Questão 4
Questão
Fluid friciton acting on an object moving through the air is known as what?
Responda
-
air resistance
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weight
-
momentum
-
mass
Questão 5
Questão
When you are swimming, you push through the water, in other words you are applying force to the water, and the water is applying the same amount of force to you. This is an example of fluid friction..
Responda
- True
- False
Questão 6
Questão
When a ball falls from the roof of a building, it accelerates until it stops accelerating. Why?
Responda
-
It hit the ground
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it reached its terminal velocity
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projectile motion
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gravity stopped
Questão 7
Questão
Why does a projectile follow a curved path?
Responda
-
two balls fall with different acceleration
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Gravity pulls the object down
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the combination of a vi and downward velocity causes the ball to follow a curved path
Questão 8
Questão
Mass can effect acceleration
Responda
- True
- False
Questão 9
Questão
Which if the following are vectors?
Responda
-
velocity
-
force
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weight
-
gravity
Questão 10
Questão
Weight =
Responda
-
mass x air resistance
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mass x projectile motion
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mass x acceleration due to gravity
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kg x m/s
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