A rock of mass 0.5 kg is launched straight up. A constant upward force of 405 N acted on the rock while it moved 25 cm upward starting from rest. Ignore air resistance. a. (4 Pts) Find the launce speed using the work-energy theorem [use g = 10 m/s2].
b. (3 Pts) Using energy ideas, find the maximum height above the launch point (25 cm) the rock will reach.

there are no contact forces mentioned on the list of choices that you've provided.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada