Question

if an object is moving, which of the following must be true? choose all that apply. the object is accelerating. the object has pe. the object has momentum. the object has a constant velocity. the object has a net force acting on it. the object has ke.

Explanation:

Step1: Analyze each option

• Accelerating: An object can move with constant velocity (no acceleration). So, this is not always true.
• PE (Potential Energy): Potential energy depends on position (e.g., height for gravitational PE). Just because an object is moving doesn't mean it has PE (e.g., moving on the ground level). So, this is not always true.
• Momentum: Momentum \(p = mv\). If an object is moving (\(v

eq0\)) and has mass (\(m>0\)), then \(p
eq0\). This is always true.

• Constant velocity: An object can be moving with changing velocity (accelerating). So, this is not always true.
• Net force: By Newton's first law, if an object is moving with constant velocity, net force is zero. So, this is not always true.
• KE (Kinetic Energy): Kinetic energy \(KE=\frac{1}{2}mv^{2}\). If \(v

eq0\) and \(m > 0\), then \(KE
eq0\). This is always true.

Answer:

The object has momentum, The object has KE.