Question

Three balls of different masses are thrown straight upward with initial speeds as indicate.
part A. Rank the speeds of the balls 1 s
after being thrown from fastest to slowest.
Rank the speeds of the balls from fastest to slowest. To rank items as equivalent, overlap them.
part B. Rank the accelerations of the balls 1 s
after being thrown from greatest to least. (Or are the accelerations the same?)
Rank accelerations of the balls from greatest to least. To rank items as equivalent, overlap them.

Answer 1

Answer:

-

Explanation:

a)
they will be in free fall so let's use vf=vi+at
Ball A :
vf= 7 + (-9.81)(1)= - 2.81 m/s
Ball B :
vf= 11+(-9.81)(1)= 1.19 m/s

Ball C : 4+(-9.81)(1) =-5.81 m/s

Ranking them based on magnitude :  VC>VA>VB

b) the only force acting on the ball is the force of gravity so -mg=ma and therefore , a=-g ALWAYS if the only force acting is gravity. Acceleration is the same