How do the presidential roles of chief executive and commander in chief differ?
a. the commander in chief role deals only with the military, while the chief executive role is broader.
b. the commander in chief role is only assumed in peacetime, while the chief executive role is only assumed during wartime.
c. the chief executive role involves foreign affairs, while the commander in chief role involves domestic issues.
d. the chief executive role is clearly defined in the constitution, while the commander in chief role is unwritten.

The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.

How are calculation for velocity and speed different

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.