LESSON 12: MASS AND WEIGHT

Question 1

moon

Answer 1

People first walked on the moon on July 20, 1969. When Buzz Aldrin and Neil Armstrong stepped out onto the surface of the Moon that day, they not only made world history — they lost weight. How is this possible? To understand weight, we must understand gravity. Gravity is a force that attracts objects to each other.
On Earth, gravity is the constant force pulling us toward Earth and preventing us from flying off into space . When you step on a scale it shows your weight as a number. This number is actually a measurement of the gravitational pull Earth has on you.

Question 2

mass vs weight

Answer 2

Mass is how much “stuff” you are made of. Unlike weight, your mass is the same whether you are on Earth, on Mars, on the moon, sitting in your living room, swimming in the ocean, or floating somewhere in outer space.

Question 3

mass (kg)

Answer 3

Mass: Mass of an object or body refers to how much matter is in the object.
It is denoted by m.
Unit of mass is the kg.

Question 4

weight (N)

Answer 4

Weight: Weight is another word for the force of gravity acting on an object. The Earth pulls on all objects with a force of gravity downward toward the centre of the Earth. The weight of an object can be found by multiplying the mass of the object by the magnitude of the acceleration due to gravity =9.8m/s2
It is denoted by W ( or F in F=ma)
Unit of weight is N ( because it is a force)

Question 5

weight formula

Answer 5

Weight can be calculated using the formula; W = mg