Forces and their interactions 5.1 Flashcards

1
Q

What is a scalar quantity?

A
  • A quantity that only has magnitude

- A quantity that isn’t direction dependent

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2
Q

What is a vector quantity?

A

A quantity that has both a magnitude and an associated direction

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3
Q

How can a vector quantity be drawn and what does it show?

A
  • As an arrow
  • The length of the arrow represents the magnitude
  • The arrow points in the associated direction
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4
Q

What is a force?

A

A push or pull acting on an object due to an interaction with another object

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5
Q

What are the two categories that all forces can be split into?

A
  • Contact forces (objects touching)

- Non-contact forces (objects separated)

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6
Q

Give 3 examples of contact forces

A
  • Friction
  • Air resistance
  • Tension
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7
Q

Give 3 examples of non-contact forces

A
  • Gravitational forces
  • Electrostatic forces
  • Magnetic forces
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8
Q

Is force a vector or a scalar quantity?

A

Vector- it has both a magnitude and an associated direction

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9
Q

Give three examples of vector quantities

A
  • Velocity
  • Displacement
  • Force
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10
Q

Give three examples of scalar quantities

A
  • Temperature
  • Time
  • Mass
  • Speed
  • Distance
  • Energy
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11
Q

What is weight?

A

The force that acts on an object due to gravity and the object’s mass

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12
Q

What quantities does weight depend on?

A

Weight=mass x gravitational field strength

  • The objects mass
  • The gravitational field strength at the given position in the field
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13
Q

What is the unit used for weight?

A

Newtons (N)

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14
Q

What is the unit used for gravitational field strength?

A

N/kg

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15
Q

What is meant be an object’s centre of mass?

A

The single point where an object’s weight can be considered to act through

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16
Q

What piece of equipment can be used to measure an object’s weight?

A

A calibrated spring-balance or newton-meter

17
Q

What is the name given to the single force that is equivalent to all the other forces acting on a given object?

A

The resultant force