A glob of slime is dropped from the edge of a cliff at t = 0. Circle the graphs

Question

A glob of slime is dropped from the edge of a cliff at t = 0. Circle the graphs that could possible show how the kinetic energy of the glob changes during its flight. e) All the graphs above are incorrect A glob of slime is launched or dropped from the edge of a cliff at t = 0. Circle the graphs that could possible show how the kinetic energy of the glob changes during its flight. e) All the graphs above are incorrect The figure below gives, for three situations, the position versus time of a box of contraband pulled by applied forces directed along an x-axis on a frictionless surface. Line B is a straight line: the others are curved. Rank the situations according to the kinetic energy of the box at time t_1 and t_2 (greatest first.) A) At t_1: A, B, C At t_2: B, C, A b) At t_1: C, B, A At t_2: A, B, C c) At t_2: A, B, C At t_2: A, B, C

Explanation / Answer

A.1 c,d

In figure a,the kinetic energy is zero at some point of time which is not possible.As the glob has been dropped it's direction of movement is downwards,to the direction of gravitational field.It's velocity can't be zero.The figure in c and d depicts the kinetic energy is non-zero,which is the case in dropping an object downwards at an angle or straight down.

A.2 e,none of the graph shows the nature of kinetic energy change with time.

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