Physics Questions on Gravity and Motion

Calculate the acceleration due to gravity of Earth. Mass of earth = 5.97 x 10^24 kg Radius of earth = 6.38 x 10^6 m Calculate the acceleration due to gravity of Jupiter. Mass of Jupiter = 1.90 x 10^27 kg Radius of Jupiter = 71.5 x 10^6 m Even though the mass of Jupiter is 300 times that of earth, why is Jupiter’s gravity roughly only 3 times that of earth?

• Because Jupiter's radius is much larger, reducing the gravitational force.

• Because Jupiter's mass is not uniformly distributed.

• Because Jupiter has a stronger magnetic field.

• Because Jupiter's atmosphere is denser.

Who first proposed a sun centered universe?

• Ptolemy

• Aristotle

• Copernicus

• Galileo

Who proved that all objects fall at the same rate?

• Isaac Newton

• Albert Einstein

• Galileo Galilei

• Aristotle

Who discovered that mass curves space?

• Isaac Newton

• Albert Einstein

• Galileo Galilei

• Niels Bohr

Who discovered the Gravitational constant, 6.67 x 10^-11 Nm^2/m^2?

• Isaac Newton

• Albert Einstein

• Henry Cavendish

• Galileo Galilei

Who discovered that Gravity is a field force?

• Isaac Newton

• Albert Einstein

• Galileo Galilei

• Michael Faraday

Who developed the 3 laws of planetary motion?

• Isaac Newton

• Galileo Galilei

• Johannes Kepler

• Nicolaus Copernicus

Who meticulously collected planetary data and believed the earth was the center of the “universe”?

• Nicolaus Copernicus

• Galileo Galilei

• Tycho Brahe

• Johannes Kepler

Centripetal acceleration and centripetal force act away from the center of rotation?

• True

• False

The velocity of a planet orbiting the sun __________ as it gets closer to the sun?

• increases
• decreases

• stays the same

• no way to tell