What is the weight of the rock with a mass of 15 kg on Mars (3.7 N/kg)?

Assume the earth's mass is 23.335 x 1025 kg, and radius is 76.394 x 103 miles, what would be the gravitational acceleration on such an planet in unit of m/s2? Use G=6.67x 10 -11 Nm2/kg2.

What is your weight 600 km above the surface of Venus, assuming that the acceleration due to gravity on the surface of Venus is 8.875 m/s2 and that your mass is 90 kg?

Assume the earth's mass is 80.004 x 1025 kg, and radius is 35.532 x 103 miles, what would be the gravitational acceleration on such an planet in unit of m/s2? Use G=6.67x 10 -11 Nm2/kg2.

Newton's law of universal gravitation is represented by Mm F = G- where F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units of the proportionality constant G? m3 kg - s2 m kg ·s3 m2 kg · s2 m2 kg · 3

In the book 2010: Odyssey Two, Chinese astronauts land on Europa, one of Jupiters Moons. Suppose one of these astronauts on Europa drops a tool 2 m above the ground. How long will it take for it to hit the ground?  MEuropa = 4.7998×1022 kg, REuropa = 1.561×106

Weight can be measured as the downward force an object exerts due to its mass times the gravitational pull of the Earth. A rock from the moon weighs 6.57 Newtons on Earth. How much did this rock weigh on the moon? The moon has a gravitational acceleration of 1.622 m/s.

"As the legend tells, Isaac Newton discovered the law of universal gravitation after an apple fell on his head. What happened with this great apple after it bounced off Newton's head?" People who visited a certain website were asked this question. Of 257 people who answered this question during the last month, 30% replied that Newton ate the apple. Calculate the margin of error for this result. Round the percentage to one decimal place. Do not round intermediate steps.   QUESTION:   If 30% of 257 people replied that Newton ate the apple, the margin of error is?

A rock, in deep space, has a rocket thruster, with negligible mass, attached to it. The rocket causes a force of 3,300[N]. If the rock has a mass of 4.62×104[kg], what is the acceleration experienced by the rock, due to this force alone? Express your answer in terms of m/s2.

Newtons version of Kepler's third law is P2=4pi2/(G(M1+M2)) x a3. Since the square of the period P varies inversely with the Sum of the masses (M1+M2), the period itself depends on the inverse square root of the object masses. If a solar system has a star that is 3.9 times as massive as our Sun, and if that solar system has Earths exact twin, what is the orbital period of that planets months ?