Mars has twice the mass of Mercury and is 4 times further away from the Sun. Calculate theratio of the gravitational force from the Sun on Mercury to the gravitational force from the Sunon Mars.

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

Which of the following best describes the circuit shown below?

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m