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Compare forces and masses

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Question 1 of 8

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Each row is a separate run on a level track. The horizontal forces and mass stay constant during each run. Gravity and support balance; ignore horizontal resistance

Both 5 kg carts start moving right at 6 m/s. The listed leftward cable pull is the only horizontal force and acts for 2 s. Neither cart stops in this interval

RunLeft pull (N)
A2
B5
1 mark

Which statement compares their speed changes over this interval?