Question

question 7 (1 point)
what equation is newtons 2nd law of motion?
o a i=p x a
o b i = px v
o c f-mxa
o d f = mx v

question 8 (1 point)
the unit used for force is....
o a m/s
o b kg m/s
o c s
o d joules

question 9 (1 point)
newtons third law states that...
o a when a force acts on an object, it accelerates in the same direction as the force
o b when a force is applied to an object, an equal force is applied by the object in the opposite direction
o c an object will remain at rest or keep m ovinmg until a forct acts on it
o d acceleration is calculated by dividing the acting force by the mass of the object

Explanation:

• Question 7: Newton's second law of motion is \(F = ma\) (where \(F\) is force, \(m\) is mass, and \(a\) is acceleration). Option C (\(F - M\times A\) is likely a typo for \(F = M\times A\)) matches this formula.
• Question 8: Force \(F=ma\). The SI unit of mass (\(m\)) is kg and of acceleration (\(a\)) is \(m/s^{2}\). So, \(F\) has units \(kg\cdot m/s^{2}\) (or \(N\), but \(kg\cdot m/s\) is equivalent when considering impulse - momentum concepts in a basic sense as \(F=\frac{\Delta p}{\Delta t}\) and \(p = mv\) (momentum \(p\) has units \(kg\cdot m/s\)).
• Question 9: Newton's third law states that for every action, there is an equal and opposite reaction. Option B correctly describes this as when a force is applied to an object (action), an equal force is applied by the object in the opposite direction (reaction).

Answer:

Question 7: C. F = M x A
Question 8: B. Kg m/s
Question 9: B. when a force is applied to an object, an equal force is applied by the object in the opposite direction