unit-2(┬┬﹏┬┬)(┬┬﹏┬┬)

Question 1

mention the 4 fundamental forces.👺🤫🤥

Answer 1

1)gravitational force
2)electromagnet force
3)weak nuclear force
4)strong nuclear force

Question 2

mention the properties of gravitational force👺🤫🤥

Answer 2

1)this is the weakest but longest-range force
2)it depends only on the mass involved and the distance between them
3)it is always attractive
4)it is relatively simple

Question 3

state the Newton universal law of gravitational force.👺🤫🤥

Answer 3

Newton’s universal law of gravitational force states that every object exerts an attractive force on every other object. This force operates along the line connecting them and is determined by two key factors: it increases with the product of their masses. It decreases as the distance between them grows, specifically by the square of that distance.

Question 4

what is the value of G on earth?👺🤫🤥

Answer 4

G=6.67 x 10^-11

Question 5

what is the formula of gravitational force?👺🤫🤥

Answer 5

(G)(M1)(M2)
F= ——————-
R^2

Question 6

what is the radius and mass of the earth?👺🤫🤥

Answer 6

Radius=(6.38 X 10^6m)
Mass=(5.97 X 10^24kg)

Question 7

why gravitational law is important??👺🤫🤥

Answer 7

1)this force is responsible for being for binding us to Earth
2)this force is responsible for the motion of the moon around the earth
3)this force is responsible for the motion of the Earth around the sun
4)the tides are formed by the rising and falling of water level in the ocean due to gravitational force exerted by the sun and moon on the earth

Question 8

what are the main points to remember regarding gravitational force and distance??👺🤫🤥

Answer 8

1)the gravitational force between two objects is inversely proportional to the square of the distance between them
2)as the distance between the objects increases, the gravitational force decreases rapidly
3)this relationship is known as the inverse square law

Question 9

mention the properties of electromagnetic force.👺🤫🤥

Answer 9

1)this force combines electric and magnetic interactions
2) it’s responsible for holding atoms together through chemical reactions and electricity and magnetism
3) it’s also responsible for light and other electromagnetic waves

Question 10

mention the properties of strong nuclear force.👺🤫🤥

Answer 10

1)this is the strongest force but has the shortest range
2)it holds protons and neutrons together in the nucleus of an atom overcoming the electromagnetic repulsion between protons

Question 11

mention the properties of weak nuclear forces.👺🤫🤥

Answer 11

1)involved in radioactive decay
2)responsible for certain types of particle interaction

Question 12

when where how and what was the first magnet founded in history?👺🤫🤥

Answer 12

more than 2000 years ago, a certain solid called lodestones from magnesia attracted pieces of iron. It is an iron-containing mineral that is naturally magnetic and is known as magnetic ore.it is a non-contact force it was located on the island of Magnesia which is situated in the west of the present-day Turkey

Question 13

define mass.👺🤫🤥

Answer 13

it is a measure of amt of matter in an object. it is in scalar quantity and remains constant regardless of location. the SI unit for mass—Kg

Question 14

define weight.👺🤫🤥

Answer 14

it is the force exerted by gravity upon an object’s mass. It is in vector quantity and depends on the gravitational strength at a specific location. the SI unit for weight—N

Question 15

define Inersia.👺🤫🤥

Answer 15

it is the resistance of an object to any change in its state of motion. the greater the mass of an object the greater its inertia meaning more force is required to change its motion.

Question 16

what is the formula for calculating weight??👺🤫🤥

Answer 16

W=M x G