Question

1. which equation represents newtons second law?

a. f = mv
b. f = ma
c. f = m/v
d. f = mg

1. an object with zero acceleration must be:

a. at rest
b. moving with constant velocity
c. moving with increasing speed
d. floating

1. newtons third law states that forces always occur in:

a. triplets
b. pairs
c. infinite sets
d. only during contact

Explanation:

• Question 4: Newton's Second Law of Motion states that the force acting on an object is equal to the mass of that object multiplied by its acceleration. The formula is \(F = ma\).
• Question 5: According to Newton's First Law, an object with zero acceleration (where the net force \(F = 0\) as \(F=ma\) and \(a = 0\)) is either at rest or moving with a constant velocity. Since “at rest” is a special case of constant velocity (velocity \(v = 0\)), the most general answer is “moving with constant velocity”.
• Question 6: Newton's Third Law states that for every action, there is an equal and opposite reaction. Forces always occur in pairs.

Answer:

• 4. B. \(F = ma\)
• 5. B. Moving with constant velocity
• 6. B. Pairs