A 65 kg person is in a head-on collision. The car's speed at impact is 17 m/s . Estimate the net force on the person if he or she is wearing a seat belt and if the air bag deploys. Express your answer to two significant figures and include the appropriate units.

Heat from the sun reaches earth to a. radiation b. convection c. conduction

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.)

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?