Answer:
KE = ½mv² = ½(0.155)(31.4)² = 76.4 J
Explanation:
The kinetic energy (KE) of the 0.155 kg arrow when it leaves the bow is 76.4 joule.
What is kinetic energy?Kinetic energy is a type of power that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force.
A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion.
Given parameters:
Mass of the arrow: m = 0.155 kg.
Upward velocity of the arrow: v = 31.4 m/s.
Hence, The kinetic energy (KE) of the arrow = 1/2 × mass × velocity²
= 1/2 × 0.155 × 31.4 joule
= 76.4 joule.
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what is meant by si unit?
Answer:
The SI base units are the standard units of measurement defined by the International System of Units (SI) for the seven base quantities of what is now known as the International System of Quantities: they are notably a basic set from which all other SI units can be derived.
Explanation:
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Which of the following was established by the Continental Congress?
O The Smithsonian
O The Supreme Court
O The US Post Office
O the Continental Army
Answer:
The second Continental Congress started the Continental Army
Explanation:
The Smithsonian was established by the continental congress
A scientist would most likely need to update her model win it a has become too simple be no longer supports the latest results see reduces the need for verbal explanation of data or tea no longer appears interesting
The question is incomplete, the complete question is;
A scientist would most likely need to update her model when it
a.has become too simple.
b.no longer supports the latest results.
c.reduces the need for verbal explanation of data.
d.no longer appears interesting.
Answer:
b.no longer supports the latest results.
Explanation:
In science, models are prepared to explain experimental results. Each model must have a solid framework supported by experimental results.
However, science is never static. Given the dynamic nature of science, it is possible that latest experimental evidence may no longer support the existing model and the model will need to be reviewed in the light of emerging experimental results.