Aperson pushing a horizontal, uniformly loaded, 25.30 kg wheelbarrow of length l is attempting to get it over a step of height h=0.430r, where r is the wheel's radius. the center of gravity of the wheelbarrow is in the center of the wheelbarrow. what is the horizontal component px of the minimum force p→ necessary to push the wheelbarrow over the step? the gravitational acceleration is g=9.81 m/s2. px=

Which of the following characteristics of earth's relationship to the sun explains the existence of earth's seasons? choose all that apply. earth has a satellite called the moon, which rotates around earth. earth spins on its axis, completing one rotation each day. earth's axis always points in the same direction relative to the stars. earth's axis is tilted relative to its orbital plane. earth orbits around the sun, completing one orbit each year.