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Four boys, Hunter, Jackson, Samuel and S...

Four boys, Hunter, Jackson, Samuel and Sean are pushing a heavy box. Their respective forces are listed below.
`{:("Boy","Force (N) "),("Hunter",25),("Jackson",25),("Samuel ",30),("Sean",35):}`
As a result of the presence of sand on the ground, the frictional force between the box and the ground is 15 N. The total force experienced by the box is

A

100 N toward the left

B

115 N toward the left

C

100 N toward the right

D

115 N toward the right

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