Jaquelin lifts a 350 N backpack a distance of 1.5 m and then carries it forward for 6.5 m. a. How much work did she do lifting the backpack?
b. How much work did she do carrying the backpack?

Substances that assume the shape of their container, but do not have a definite size are called

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.

Abody covers a semicircle of radius 7cm in 5s .find its linear speed