A Juggler Throws Two Balls Up to the Same Height

question 112

Multiple Choice

A juggler throws two balls up to the same height so that they pass each other halfway up when A is rising and B is descending. Ignore air resistance and buoyant forces. Which statement is true of the two balls at that point?

• A) There is an residual upward force from the hand on each ball.
• B) There is a greater residual force from the hand on A than there is on B.
• C) Only gravity acts on B but there is an additional residual force from the hand on A.
• D) There is an additional downwards force besides gravity on each ball.
• E) The only force acting on each ball is the gravitational force.

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Definitions:

Binding

A process by which molecules adhere together or to other molecules, often used to describe biochemical or molecular interactions.

Deficiency

A lack or shortage of a necessary substance in the body or in any other system.

Rupture

A break or tear in any organ or soft part of the body, which can cause a sudden loss of function or severe pain.

Crushing

Exerting pressure or force to deform or break an object, often causing complete destruction.