What net force is required to acceleration a 2 kg rock 20 m/s2 in gravity free space

Hello!

What you are describing here is Newton's second law, this is very important to know because it gives you the equation to answer this question.

Newton's second law states:

Fnet = (mass) * (acceleration)

and its unit of measurement is the Newton (kg * m/s^2), that is dimensional analysis coming from -

mass = kg

acceleration = m/s^2

Since the equation is the mass times the acceleration, you do the same with the units so it gives you (kg * m/s^2) which is known as Newtons. (Just as a side note!)

On wards!

Known:

m = 2 kg

a = 20 m/s^2

Unknown:

Fnet  = ?

Alright we have 2 known's and 1 unknown, that's good because now we can solve for the net force!

Fnet = m * a

Fnet = 2 kg * 20 m/s^2

Fnet = 40 N

In conclusion, it takes 40 Newtons of force to accelerate a 2 kg rock 20 m/s^2 in gravity free space!

Hope this helps & good luck with your studies

P.S. Make sure you re-visit newtons second law so you can flex on everyone in class and be relaxed! It is a very important topic so I recommend khan academy videos, they are awesome!

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2