Me on 7& 8. it would be really appreciated. : ) i will be giving brainiest.

The answer to your question is below

Explanation:

For question seven, from the posible solutions, the only one that has units of acceleration is the first one, 2.00 m/s², My answer is 6.00 m/s², but in the solutions 6.00 m/s has units of velocity not acceleration, so I would choose the first option.

The law of Newton that says that for every action there is and equal but opposite reaction is the third law,

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s