Physical change :) Hope you get it right! :D Good luck! let me know what else I can help you with. Have a great day! :D
Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.
B) 20 cm
The height and distance will be the same. Only the image will be laterally inverted.
Answer:
The weight will be smaller than on Earth.
Explanation:
We call weight, to the product of the mass times the acceleration produced on this mass, due to the Universal law of gravitation.
This acceleration can be obtained applying Newton’s 2nd Law to the gravitational attractive force, as follows:
Fg = G m1m2 / (r12)2 = m1* a → a= G m2 / (r12)2 =g
If we take a planet with the same mass, but a larger size, this means that the distance, from the planet’s surface to the center, will be larger also.
As the gravitational attraction is inversely proportional to the square of the distance, this means that the acceleration caused by this force, will be smaller than on Earth.
As the mass is an universal constant, this means that the weight (as measured on a scale as the normal force) will be smaller also.
D. An ice skater spinning in place