Physics: A particle of mass 1.2 mg is projected vertically upward from the ground with a velocity of 1.62 x 10 cm/h. Use the above information to answer the following four questions: 7. The kinetic energy of the particle at time t = 0 s is A. 1.215 x 10-3 J B. 2.430 J C. 1215 J D. 9.72 x 106 J E. OJ (2)

Form concentric circles around the wire...

A particle of mass 1.2 mg is projected vertically

dbhuggybearow6jng

04.08.2021

K = 0 J

Explanation:

Given that,

The mass of the particle, m = 1.2 mg

The speed of the particle, $v=1.62\times 10\ cm/h$

We need to find the kinetic energy of the particle at time t = 0 s.

At t = 0 s, the particle is at rest, v = 0

So,

$K=\dfrac{1}{2}mv^2$

If v = 0,

$K=0\ J$

So, the kinetic energy of the particle at time t = 0 s is 0 J.

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