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Unit 1 lesson 3 : Relation between mass and weight

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by

Ahmed Hussein

on 10 August 2016

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Transcript of Unit 1 lesson 3 : Relation between mass and weight

The Object Mass
Weight = mass x 10
[Newton] (Kg)
Unit 1 lesson 3 : Relation between mass and weight
Mass and weight

Mr.ahmed Elbasha
Example
Example 2: A piece of rock is placed in a pan of double pans balance, the sum
of masses which are placed in the other pains 300 gm to make balance.
A. What is the mass of the piece of rock? What is the direction of the
effect of this mass?
B. What is the weight of the piece of rock? What is the direction of the
effect of this mass?
C. What is the effect of changing the place on both mass and weight of
the rock piece?
Answer: 1- The mass of the piece of rock=300 gm =0.3 kg.
Mass has no direction
2- Weight = mass (kg) x 10
= 0.3 x 10 = 3 Newton. Towards the center of the earth
3- Mass is constant but the weight changes from one place to another.
Examples
Example 1: An object’s mass on earth is equal to 6 kg. Calculate its weight on
the earth’s surface
Answer: Weight = mass (kg) x 10
= 6 x 10 = 60 Newton
2. The Planet Where The Object Exist
The weight of the object on the surface of the earth
differs
from the
weight of the same object on the Surface of the moon.
(Give reason)
The more the planet's mass, the more the gravitational force, the
more the object's weight.

 What happens if:
There is no gravity on the Earth’s surface. لايٛخذ خبرثيخ
Answer
:
All objects on Earth’s surface don't have weight.
1. The Object Mass
W on Earth =
W on moon x 6
W on moon =
W on Earth / 6
Example
: An object whose mass on earth is equal to 6 kg. Calculate its
weight on the earth’s surface and on the moon.

Answer

Weight on earth = mass (Kg.) x 10
= 6 x 10 = 60 Newton
Weight on moon = W on Earth / 6
= 60 / 6 = 10 Newton
3. The Distance from the center of the earth
The earth gravitational force
decreases
as the body moves away from the
earth.
Give reason
: the weight of person in a plane is smaller than on Earth
Bec
. Weight decreases as distance increases
Mass And Weight
Full transcript