A Block of Mass M = 8

question 19

Multiple Choice

A block of mass m = 8.40 kg, moving on a horizontal frictionless surface with a speed 4.20 m/s, makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 8.40 block recoils with a speed of 0.400 m/s. In the figure, the blocks are in contact for 0.200 s. The magnitude of the average force on the 8.40-kg block, while the two blocks are in contact, is closest to

• A) 193 N
• B) 185 N
• C) 176 N
• D) 168 N
• E) 160 N

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Definitions:

Standard Error

A measure of the variability or precision of a sample statistic as an estimate of a population parameter.

Credit Sales

Transactions where goods or services are provided to a customer with an agreement to pay later.

Degrees of Freedom

Degrees of freedom typically represent the number of values in a calculation that are free to vary, often used in the context of statistical tests to specify the distribution of test statistics.

T Distribution

A probability distribution that is used in hypothesis testing for small sample sizes, when the population standard deviation is unknown.