Question

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)​

Answer 1

K = 0 J

Step-by-step explanation:

Given that,

The mass of the particle, m = 1.2 mg

The speed of the particle,
`v=1.62* 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=(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.