Question

A particle of mass 1.2 mg is projected vertically upward from the ground with a velocity of 1.62 x 107 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 ___________

Answer 1

The kinetic energy needed to escape from the surface is given as,

E=

2

1

mv

e

2

=

2

1

m(

R

e

2Gm

)

2

=

R

e

GMm

Since, the potential energy at the maximum height will be equal to the sum of half kinetic energy and the potential energy at the surface of the earth.

It can be written as,

−

R

e

GMm

+

2

1

R

e

GMm

=−

R

e

+h

GMm

2R

e

1

=

R

e

+h

1

h=R

e

The maximum height is R

e

.

Answer 2

Answer:

xenonparticle of mass 1.2 mg is projected vertically upward from the ground with a velocity of 1.62 x 107 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 _____

k

ego stump froze