Question

A glob of slimeis launched or dropped from the edge of a cliff. Which of the graphs in the figure below could possibly show how the kinetic energy of the glob changes during itsflight? (Select all that apply.)

Answer 1

Kinetic Energy =m.

Because the glob of slime has an increase in speed as it accelerates due to gravity, the Kinetic Energy will increase as it is falling.

(a) through (c) would definitely not apply because these all show the Kinetic Energy of the glob of slime decreasing. (d) would not apply,because the kinetic energy would not be negative. (e) could not apply either because there would have to be some kinetic energy at any given timein a launch (there would be a horizontal component of velocity because if the glob is launched and it has to go off of the cliff, then it needs to bemoving both horizontally and vertically).

(f) could apply if the glob is dropped off of the cliff.

(g) could also apply if the glob is launched off of the cliff and it is already in motion when it is being launched

(h) could apply if the glob is already in motion when it is being dropped

Answer 2

variation ,

0.5mv^2 = mgh

v = (2gh)^0.5

KE = 0.5 x m x 2gh = mg ( 0.5gt^2) = 0.5mgt^2

at t= 0, KE = 0
at t= infinity, KE = infinity

Hence Option - f is correct