A satellite was launched in order to observe the Saturn. At the moment the distance between the satellite and the Saturn was
10 km with an attractive force 10,000 N. While after 20
seconds, the distance decreased to 5 km, what is the force
then (in N)?

Aballet student who learns with the of his instructor is demonstrating learning.

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

This is the substance(s) formed in a chemical reaction.