Lesson 7

Chapter 2 Forces
Section 3 Driving forces and resisting forces
This Lesson
  • Discussing exercises
  • Newtons first law
  • Air resistance
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This lesson contains 10 slides, with text slides.

time-iconLesson duration is: 45 min

Items in this lesson

Chapter 2 Forces
Section 3 Driving forces and resisting forces
This Lesson
  • Discussing exercises
  • Newtons first law
  • Air resistance

Slide 1 - Slide

Discussing section 2

exercise 5 and 6

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Practice exercise
On an experimental setup on the moon a weight with a mass of 5 kilogram is hung on a spring with a spring constant of 0,45 N/m. Calculate the extension of this spring.

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Voyager 2

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Newtons first law
If the resultant force of all the forces is zero (0N), the object is either stationary or it moves along a straight line at a constant speed

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Air resistance
Fr,a=21CdρAv2
  • Fr,a: Force, resistance, air resistance (n)
  • C: resistance coefficient (no unit)
  • ρ: The density of air (or whatever medium the object is traveling through) (kg/m3)
  • A: area of the object (m2)
  • v: the speed of object (m/s)

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