Question

in a system such as bumper cars or rockets, what do newtons laws help scientists do?
only describe the motion of one object.
eliminate all external forces.
measure only the strength of gravity.
analyze how forces interact and predict future motion.

multiple choice 1 point
according to newtons second law, what happens if the same force is applied to two object
the forces will cancel each other out.
the object with greater mass will accelerate more.
the object with smaller mass will accelerate more.

Explanation:

• Question 4: Newton's Laws are not limited to one - object motion (so the first option is wrong). External forces cannot be eliminated in real - world systems like bumper cars or rockets (second option wrong). They are not just about gravity (third option wrong). Newton's Laws, especially the second and third laws, help analyze force interactions (e.g., action - reaction in bumper cars) and predict motion (e.g., rocket thrust and resulting motion).
• Question 5: According to Newton's Second Law \(F = ma\) (where \(F\) is force, \(m\) is mass, and \(a\) is acceleration), if \(F\) is the same (\(F_1=F_2\)), then \(a=\frac{F}{m}\). So, when \(m\) is smaller, \(a\) is larger. The forces are applied to different objects, so they don't cancel each other out (first option wrong). A greater mass means less acceleration (second option wrong).

Answer:

• Question 4: Analyze how forces interact and predict future motion.
• Question 5: The object with smaller mass will accelerate more.