Laws of Motion Test Flashcards

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1
Q

a push or pull of an object

A

force

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2
Q

a push or pull on an object by another object that is touching it

A

contact force

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3
Q

a force that one object can apply to another object without touching it

A

noncontact force

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4
Q

an attractive force that exists between all objects

A

gravity

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5
Q

what is the amount of matter in all objects

A

mass

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6
Q

what is the gravitational force exerted on an object

A

weight

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7
Q

how does the gravitational force between objects is affected by their mass and distance between them

A

When the mass increases the gravitational force also increases

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8
Q

What are the three kinds of friction

A
  • static friction
  • fluid friction
  • sliding friction
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9
Q

Forces of 10N up, 10N down, 10N to the right, and 25Nto the left are acting on a ball. Which direction is the ball moving

A

15N to the left

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10
Q

Forces of 100N up, 100N down, 85N to the right, and 100N to the left are acting on a ball. Which direction is the ball moving

A

15N to the left

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11
Q

Which Newton’s law states that An object in motion will stay in motion and an object at rest will stay at rest, unless unbalanced force act on it

A

Newtons first law

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12
Q

the combination of all the forces action on an object

A

net force

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13
Q

forces acting on an object that combine and form a net force of zero

A

balanced forces

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14
Q

Forces acting on an object that combine and form a net force that is not zero

A

unbalenced forces

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15
Q

Which kind of forced cause a change int he object’s direction (balanced or unbalanced)

A

Unbalanced

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16
Q

why do objects stop moving

A

friction

17
Q

Which of Newtons laws state that the acceleration of an object is equal to the net force acting on the object divided by the objects mass

A

Newtons second law

18
Q

Which of Newtons law of Motion states that when one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object

A

Newtons third law

19
Q

What is the formula for momentum

A

mass time velocity: p=mv

20
Q

Why is it harder for a large truck to stop than a small car when they’re moving at the same speed

A

the bigger truck has more momentum and mass

21
Q

what is an example of inertia?

A

falling leaves

22
Q

what are some examples of newtons second law

A
  • pushing a shopping car
  • itting a ball
  • car crash
  • rocket launch
23
Q

what are some examples of Newtons third law

A
  • A horse pulls a cart
  • when the hammer hits the nail
  • magnets attract a paper clip