can someone please help me with my science test, for free (8th grade)? there's 15 questions, mostly about weather. it would mean the world !!

In physics the desire of an object to keep doing what it is doing is termed?

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.)

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?