3
An archer defending a castle is on an
15.5 m high wall. He shoots an arrow
straight down at 22.8 m/s. How much
time does it take to reach the ground?
(Unit = s)
Watch your minus signs!

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m