Select from the following a scenario that does not have a net force acting on it.

a - accelerating a car from a stop sign

b - driving straight down the highway at 60 mph

c - lifting a chess pics off a board

d - throwing a ball

B - Driving straight down the highway at 60 mph

Explanation:

As we know by Newton's II law that net force on an object will follow the relation given as

so here all the cases where object is accelerating then it means it is followed by some external force on it

so here we have

A - Accelerating a car from a stop sign

C - Lifting a chess pics off a board  

D - Throwing a ball

all above cases objects are accelerating so it shows net force on them

while correct answer for no force on the object is

B - Driving straight down the highway at 60 mph

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the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome