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1. Calculate the weight of a watermelon with a mass of 2 kg on the earth (g = 9.80 m/s2) and on the moon (g = 1.63 m/s2). Use this example to describe the differences between mass and weight and how mass and weight are related.


2. Apply Newton’s second law to calculate the frictional force needed to hold a 0.02 kg pen in your fingers and keep it from falling. (g = 9.8 m/s2)

Sagot :

354322

Answer:

Fg=mass x gravity

Fg is the same as weight

so Fg=(1360kg)(9.8m/s^2)

He weighs 13,328N or 1.3x10^4N if you use the proper significant digits

Weight of watermelon on earth and moon are 19.6 N and 3.26 N and Frictional force on pen needed is 0.196 N

Given:

Mass of water melon = 2 kg

Gravitation force on earth = 9.8 m/s²

Gravitation force on moon = 1.63 m/s²

Mass of pen = 0.02 kg

Find:

  • Weight of watermelon
  • Frictional force on pen

Computation:

We know that;

Weight is a type of force

So,

F = ma

Weight of watermelon on earth = (2)(9.8)

Weight of watermelon on earth = 19.6 N

Weight of watermelon on moon = (2)(1.63)

Weight of watermelon on moon = 3.26 N

Frictional force on pen = (0.02)(9.8)

Frictional force on pen = 0.196 N

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