A Uniform Plank Is 6

question 18

Multiple Choice

A uniform plank is 6.0 m long and weighs 80 N.It is balanced on a sawhorse at its center.An additional 160 N weight is now placed on the left end of the plank.To keep the plank balanced, it must be moved what distance to the right?

• A)6.0 m
• B)2.0 m
• C)1.5 m
• D)1.0 m
• E)0.50 m

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Definitions:

Long-Day Plant

Plant that flowers when day length is longer than a critical length; e.g., wheat, barley, clover, and spinach.

Phytochrome

A plant pigment involved in regulating various processes like germination and flowering in response to light conditions.

Pollinate

The transfer of pollen from the male parts of a flower to the female parts of the same or another flower, leading to fertilization and the production of seeds.

Cytokinin

A class of plant hormones that promote cell division and growth, and affect various aspects of plant development including shoot and root growth.