Question

suppose an object moves upward at a constant speed. in this situation, the objects kinetic energy would ____, its potential energy would __, and its total mechanical energy would ____. enter the three letters in their respective order. a. remain the same b. increase c. decrease d.... nonsense! it is impossible to tell without additional info.

Explanation:

Step1: Analyze kinetic energy

Kinetic energy formula is \(K = \frac{1}{2}mv^{2}\). Since the object moves at a constant speed (\(v\) is constant) and mass \(m\) is constant, kinetic energy remains the same.

Step2: Analyze potential energy

Gravitational potential energy formula is \(U = mgh\). As the object moves upward (\(h\) increases) and \(m\) and \(g\) are constant, potential energy increases.

Step3: Analyze total mechanical energy

Total mechanical energy \(E=K + U\). Since \(K\) is constant and \(U\) increases, total mechanical energy increases.

Answer:

a, b, b