CAN SOMEONE HELP ME WITH THESE PHYSICS QUESTIONS? I'm reviewing for an exam...

Question

fanduekisses · Answer

A net force of 10 N causes a mass to accelerate at 6 m/s2.  What would be the      acceleration if the mass were doubled and the force kept constant?

acxbox22 · Answer

f=ma
10=6m
5/3=m
5/3 x 2= 10/3
10=10/3a
a=??

acxbox22 · Answer

do you understand the steps?

mathmath333 · Answer

$\large \tt \begin{align} \color{black}{F=ma\~\
10=m6\~\
m=\dfrac{5}{3}\~\
\normalsize \text{now the mass is doubled but force kept constant}\~\
F=2ma\~\
10=2\times \dfrac{5}{3}a\~\
 }\end{align}$

acxbox22 · Answer

both ways represent the same thing @Fanduekisses

fanduekisses · Answer

it's 3 m.s :)

fanduekisses · Answer

3 m/s

acxbox22 · Answer

yep 3m/s^2

acxbox22 · Answer

;)

fanduekisses · Answer

hehe I forgot about that force is mass x acceleration

acxbox22 · Answer

the acceleration was halved

fanduekisses · Answer

A 2,000-kilogram automobile accelerates horizontally to a speed of 20 m/s. The increase in its gravitational potential energy is:

fanduekisses · Answer

wait, wouldn;t it be zero? because it is moving...

acxbox22 · Answer

post the questions separately so you can receive maximum help from more people, thanks ;)