Gravitational Forces

Question 1

what does this G represent

Answer 1

universal gravitational constant

Question 2

what doe this g represent

Answer 2

the acceleration due to gravity

Question 3

what is the value for gravitational constant

Answer 3

6,7 x 10 ^-11

Question 4

what is the value of the acceleration due to gravity

Answer 4

9,8 m/s^-2

Question 5

write down Newton’s law of gravitation

Answer 5

every object in the universe attracts every other object in the universe with the force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers .

Question 6

define free fall

Answer 6

an object is in freefall;; when the only force causing it to accelerate is gravitational force.

Question 7

Tyco Brache (1546-1601)

Answer 7

made systematic observations of be planets every clear night for 20 years. He did all of this before telescopes were invented

Question 8

Johannes Kepler (1571-1630)

Answer 8

used Brache’s observations to develop his 3 laws of planetary motion which led Newton to his study of motion.

Question 9

Sir Isaac Newton (1642-1727)

Answer 9

…

Question 10

Henry Cavendish

Answer 10

his measurements of the force between lead spheres made it possible to calculate the universal gravitational constant

Question 11

Albert Einstein

Answer 11

him and his theory of relativity which considers the motion of objects moving near the speed light.