Physics Y10 Flashcards

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1
Q

Forces:

  • Define
  • What are the four forces
  • How do you label force diagrams
  • What is the equation?
  • Unit?
A
  • A push or pull
  • Weight (down), Support force (up), Drag (resistance/friction), Thrust (push).
  • Connect arrows to object, bigger arrow in the direction of travel.
  • Fnet = m x a
  • Newtons (N)
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2
Q

Define and give equations for:

  • Mass
  • Weight
  • Speed
  • Acceleration
A
  • How much matter is in an object (Kg)
  • The downward force caused by gravity (Fw=Mxg)
  • Rate or change of distance (v=d/t) (ms)
  • The rate or change of speed (A=change in speed/time) (ms-2)
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3
Q

How do you describe motion in terms of speed and acceleration?

A
  • Constant speed
  • Stationary
  • increasing acceleration
  • Negative acceleration
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4
Q

Friction:

  • define:
  • How do you increase/decrease friction?
  • When is friction helpful/not helpful?
A
  • contact force that opposes motion
  • Increase: make surface rough/dry. Decrease: make contact surface smaller, oily, more stream line.
  • Helpful: Warming hands, soles on shoes, sand paper. Not helpful: wear in tires, more fuel to move cars, entry of space shuttles.
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5
Q

Forces x2:

  • List three contact forces:
  • List three non-contact forces:
A
  • support force, air resistance, thrust

- Magnetic, electrostatic and weight.

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6
Q

Define and give formula and units:

  • Power
  • Voltage
  • Current
  • Resistance
A
  • The amount of electrical energy each component uses (P=VxI), given in watts.
  • The measure of hoe much energy each charge carries, (volts).
  • The rate of flow of electrical charge, (amps, I)
  • How much substance prevents the flow of electricity), (R=V/I), given in ohms.
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7
Q

Circuits:

  • What does voltage and current do in Series
  • -What does voltage and current do in Parralel
A
  • Current stays the same and voltage splits.

- Voltage stays the same and current splits

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