I fell off a 50 meter tower. I weigh 100 kg. Gravity pulls down with an acceleration of 9.8 m/s². (a)How fast am I going after 1s? (b)after10s?
(c)With what force do I hit the ground? Ignore air resistance.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

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.)

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?