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A student wants to know if the weight of a cart affects its speed at the bottom of a ramp. He can change the weight of the cart by adding different numbers of balls, and he can change the height of the
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19 votes
A student wants to know if the weight of a cart affects its speed at the bottom of a ramp. He can change the weight of the cart by adding different numbers of balls, and he can change the height of the ramp by using different numbers of blocks. Which three tests would be invalid? (Select all three)

A student wants to know if the weight of a cart affects its speed at the bottom of-example-1
User Impl
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2 Answers

13 votes
13 votes

Answer: its the first one

Step-by-step explanation:

User Alexandre Moraes
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12 votes
12 votes

Answer: D

Step-by-step explanation:

User The Pjot
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