A Block of Mass M = 8

question 7

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:

Estrogen

A collection of steroid hormones responsible for stimulating and preserving female traits in humans.

ATP

Adenosine triphosphate, a molecule that stores and transfers energy within cells.

Endometrium

The mucous membrane lining the inside of the uterus, which thickens during the menstrual cycle in preparation for potential pregnancy.

Menstrual Phase

The initial phase of the menstrual cycle characterized by the shedding of the uterine lining.