A 137-Kg Block Is Held in Place Against the Spring by by a 74-N

question 29

Multiple Choice

A 1.37-kg block is held in place against the spring by a 74-N horizontal external force (see the figure) .The external force is removed,and the block is projected with a velocity upon separation from the spring.The block descends a ramp and has a velocity at the bottom.The track is frictionless between points A and B.The block enters a rough section at B,extending to E.The coefficient of kinetic friction over this section is 0.24.The velocity of the block is at C.The block moves on to D,where it stops.The initial compression of the spring is closest to

• A) 2.7 cm.
• B) 1.4 cm.
• C) 0.96 cm.
• D) 5.3 cm.
• E) 3.6 cm.

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Definitions:

Correlation Coefficient

A statistical measure that calculates the extent to which two variables change together, indicating the strength and direction of a linear relationship.

True Score

The actual score that accurately reflects the tested attribute or characteristic without error.

Reliable Measure

A consistent and dependable method of measurement that yields the same results under similar conditions.

Measurement Error

The difference between a measured value and the true value that can result from various inaccuracies or biases.