A Child in a Sled Is Moving with a Speed

question 66

Multiple Choice

A child in a sled is moving with a speed of 4.0 m/s across an iced over pond.If the total mass of the sled-child system is 85.0 kg,what magnitude of the average force is required to bring the sled to rest in 10.0 s?

• A)14 N
• B)24 N
• C)34 N
• D)44 N
• E)54 N

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Definitions:

Dermatome

A specific area of skin that is innervated by sensory fibers from a single spinal nerve root.

Grafting

A horticultural technique whereby tissues from one plant are inserted into those of another so that the two sets of vascular tissues may join together, also used in surgery for transplanting skin or other tissues.

Sudoriferous Glands

Glands located in the dermis layer of the skin, responsible for producing and secreting sweat.

Perspiration

The process of sweating, where the body releases fluid through the sweat glands as a means of cooling down.