Multiple Choice 1) The mass of Mercury is 3.2 x 10²³ kg and its radius is 2.43 x 10⁶. What is the value of g on this planet?

a) 3.6m/s^2, b) 7.6m/s^2, c) 8.8*10^6m/s^2, d) 1.3*10^17m/s^2

2) A satellite has a mass m and a weight F_g in a lab on the surface of Earth. It is placed in a rocket and sent to a distance of two Earth radii above the surface of Earth. As it travels from Earth to this new location, which of the following is correct?

a) The mass of the satellite decreases and the weight remains constant.

b)The mass of the satellite remains constant and its weight decreases.

c)Both the mass of the satellite and its weight remain constant.

d)Both the mass of the satellite and its weight decrease.

3)At the surface of Earth, an astronaut has a gravitational mass of 80 kg at a location where the acceleration due to gravity is 10 m/s². What is the force of gravity on the astronaut at a location one Earth radius above Earth's surface?

a)40 N [toward the centre of Earth], b)200 N [toward the centre of Earth], c) 400 N [toward the centre of Earth], d) 800 N [toward the centre of Earth]

4)

An object travels in a circular path. If the period of the object increases, the object's O speed stays the same; O speed decreases; O speed increases; O velocity stays the same