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3 years ago

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Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kin

etic energy?
A.
1.7 × 102 joules
B.
1.5 × 102 joules
C.
2.0 × 102 joules
D.
2.2 × 102 joules

1 answer:

nexus9112 [7]3 years ago

6 0

Answer:

A

Explanation:

KE = 1/2 mv^2

=1/2(30kg)( 3.4 m/s)^2

=173.4 joules

=1.7×10^2 joules

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The acceleration is $0.095 m/s^2$

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We can solve the problem by applying Newton's second law of motion: in fact, the net force acting on an object is equal to the product between the mass of the object and its acceleration. Therefore we can write:

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So, Newton's second law can be rewritten as:

$F_1 -F_2 = ma$

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Learn more about Newton's second law:

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