Two Identical Carts Travel at 1 M/s on a Common

question 94

Multiple Choice

Two identical carts travel at 1 m/s on a common surface.They collide head-on and are reported to rebound, each with a speed of 2 m/s.Then:

• A)momentum was not conserved, therefore the report must be false
• B)if some other form of energy were changed to kinetic during the collision, the report could be true
• C)if the collision were elastic, the report could be true
• D)if the surface were inclined, the report could be true
• E)kinetic energy increased, therefore the report must be false

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Definitions:

Bias

A systematic error or deviation from the truth in results or inferences that can affect the validity of research findings.

Randomization

is a process used in experimental designs to allocate subjects randomly to different groups to ensure each group is similar and that the treatment effects can be attributed solely to the treatment being tested.

Concealment of Random Allocation

A technique used in clinical trials to prevent selection bias by ensuring the assignment of participants to different groups is not known in advance by the researchers.

Masking

A method in research where information that could influence the results is concealed from participants, researchers, or both, to minimize bias.