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Physics Paper 1 > Newtons Laws > Flashcards

Newtons Laws Flashcards

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1
Q

what is newtons first law

A

a body will remain at rest or continue in a straight line at a constant speed as long as the forces acting on it are balanced

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2
Q

what is the resultant force

A

the overall force on an object

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3
Q

what is newtons second law

A

when a resultant force acts on a mass there will be a change in its velocity, the resultant force determines the size and direction of the acceleration of the mass

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4
Q

what is the formula for acceleration that uses force and mass

A

acceleration = force/mass

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5
Q

what is mass

A

the amount of matter that is within an object

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6
Q

what is the unit for mass

A

KG

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7
Q

what is weight

A

weight is the force that a body experiences due to its mass and gravitational field strength

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8
Q

what is weight measured in

A

N

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9
Q

what is the formula for Weight

A

W = mass * gravitational field strength

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10
Q

what 2 factors affect an object’s gravitational field strength

A

mass
radius

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11
Q

what do you call the force acting inwards from a rotating object

A

centripetal force

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12
Q

what is momentum

A

the power of an object when it is moving

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13
Q

what is the formula for momentum

A

mass * velocity

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14
Q

what is the formula for the force that takes in momentum

A

change in momentum/time

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15
Q

what are 2 safety features of cars

A

seat belts and crumple zones

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16
Q

what is newtons third law

A

every action has an equal and opposite reaction

17
Q

what is the average reaction time

A

0.2 seconds

18
Q

what 4 factors affect reaction time

A

tiredness
alcohol and drugs
distraction
age

19
Q

what 2 factors make up the stopping distance

A

thinking distance
breaking distance

20
Q

what is thinking distance

A

the distance the car travels while the driver reacts to the danger and applies the brake

21
Q

what is braking distance

A

the distance the car travels while slowing down

22
Q

factors that affect braking distance

A

mass of car
weather
tyre conditions
brake conditions

23
Q

what is the equation used to find the work done to stop a car

A

Force * distance = 0.5 * length * speed squared

Physics Paper 1 (10 decks)

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