Question

7 glenn is trying to move a refrigerator by himself. he is pushing, but he cannot get the refrigerator to move at all. which of the following statements is accurate? the coefficient of static friction is too low for glenn to overcome the coefficient of kinetic friction is too high for glenn to overcome. the coefficient of kinetic friction is too low for glenn to overcome. the coefficient of static friction is too high for glenn to overcome

Explanation:

Static friction acts on objects at rest. The formula for static friction force is \(F_s=\mu_s N\) (where \(\mu_s\) is the coefficient of static friction and \(N\) is the normal force). If the refrigerator doesn't move, it means the applied force is less than the maximum static - friction force. A higher \(\mu_s\) (coefficient of static friction) would lead to a higher maximum static - friction force. Kinetic friction (\(\mu_k\)) acts on moving objects. Since the refrigerator is not moving, kinetic - friction concepts are not relevant here.

Answer:

The coefficient of static friction is too high for Glenn to overcome.