Mass and Weight (1) (1) Flashcards
What is the region surrounding the Earth where gravity is experienced called?
Gravitational field
The gravitational field is strongest on the surface of the Earth and weakens further away.
How is gravitational field strength defined?
Force acting per unit mass
It is denoted by g, the letter also used to denote the acceleration of free fall.
What is the value of gravitational field strength on the Earth’s surface?
9.8 N/kg
This is approximately equal to 10 N/kg.
What does g represent in the context of gravitational field strength?
Acceleration of free fall
g = 9.8 N/kg = 9.8 m/s².
What is the weight of a 1 kg mass on Earth’s surface?
9.8 N
Weight is calculated using the formula W = mg.
What is the formula for calculating weight?
W = mg
Where W is weight, m is mass, and g is gravitational field strength.
What is the weight of a 75 g mobile phone on Earth?
0.74 N
Calculated by converting mass to kg and using W = mg.
What is the acceleration of free fall on the Moon?
1.6 m/s²
This is significantly lower than the acceleration on Earth.
What is the weight of a 10 kg rock on Earth?
98 N
Calculated using W = mg with g = 9.8 m/s².
What is the weight of a 10 kg rock on the Moon?
16 N
Calculated using W = mg with g = 1.6 m/s².
Define mass.
Measure of the amount of matter in a body
The standard unit of mass is kilogram (kg).
What is the SI unit of weight?
Newton (N)
Weight is a vector quantity.
What is inertia?
Reluctance of an object to change its state of rest or motion
Inertia depends on the mass of an object.
What happens to an object with greater mass in terms of inertia?
It has greater inertia
More mass makes it harder to change motion.
What is the relationship between mass and weight?
Weight is equal to mass times gravitational acceleration (W = mg)
This relationship shows how weight varies with gravitational force.
True or False: Weight varies with location.
True
Weight is affected by the distance from the center of the Earth.
Fill in the blank: The gravitational force on an object is known as its _______.
Weight
Fill in the blank: The standard unit of mass is the _______.
Kilogram
What is the weight of an object with a mass of 1 kg?
9.8 N
Weight approximates to 10 N for simplicity.
