Question: [ Maximum mark: 1 ] A cart accelerates from ( 2 0 + - 1 ) m s - 1 to ( 3 0 +

[Maximum mark: 1]
A cart accelerates from (20+-1)ms-1 to (30+-1)ms-1.
What is the percentage uncertainty in the change of speed of the cart?
A.2%
B.4%
C.8%
D.20%
[ Maximum mark: 1 ] A cart accelerates from ( 2 0

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