Question

2 points each - true or false?
for newtons first law of motion, an object must not be moving.
the coefficient of static friction is larger than the coefficient of kinetic friction
weight is a measure of force

Explanation:

• First Statement: Newton's First Law of Motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. So, an object can be in motion (with constant velocity) for Newton's First Law.
• Second Statement: In general, the coefficient of static friction (\(\mu_s\)) is larger than the coefficient of kinetic friction (\(\mu_k\)). For example, when trying to start moving a heavy box, more force is needed initially (static friction) than to keep it moving (kinetic friction).
• Third Statement: Weight \(W = mg\) (where \(m\) is mass and \(g\) is the acceleration due to gravity). Since force \(F=ma\), weight is a force (measured in Newtons).

Answer:

1. False
2. True
3. True