a crowbar 2 metres long is used to lift a rock weighing 800 newtons .If the fulcrum is 0.25 metre, from where the bar touches the rock, how much effort must be applied to move the rock

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

What part of the ear is names after tools, such as the hammer and the anvil?

Hunter’s velocity was 4.5 m/s. at the end of his race, his velocity was the same. which best describes his movement? his movement stopped. his acceleration is zero. his time was constant. his acceleration was positive.