Which of these follows from kepler's laws of planetary motion? a- a satellite will slow down as it gets further from the much more massive object it orbits. b- objects attract each other with a force proportional to the product of their masses. c- planets closer to the sun have lower orbital speeds. d- all planets move in circular orbits.

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?