Answer:

Explanation:
The work done on a particle by external forces is defined as:

According to Newton's second law
. Thus:

Acceleration is defined as the derivative of the speed with respect to time:

Speed is defined as the derivative of the position with respect to time:

Kinetic energy is defined as
:

Answer:
Gravitational force affects weight, weight changes with change in gravity
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pitch is the perceived frequency of a sound wave.
C. Populations.
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