Examples were friction is not useful

Why there will be a change in the sole of the shoes after using many days?

It is possible that the universe may A. further break itself apart, creating new structures in space. B. explode within the next million years. C. continue to expand forever. D. dissipate from lack of sufficient matter.

A rope is used to pull a 5.07 kg block at constant speed 2.36 m along a horizontal floor. the force on the block from the rope is 3.01 n and directed 12.4° above the horizontal.

The amplitude of a wave is dependent upon what? A. the amount of energy carried by the wave B. the maximum displacement from the rest position C. neither A nor B D. both A and B

A 1.03 µF capacitor is connected in series with a 1.98 µF capacitor. The 1.03 µF capacitor carries a charge of + 11.1 µC on one plate, which is at a potential of 49.5 V. (a) Find the potential on the negative plate of the 1.03 µF capacitor.

Which statement describes the formation of a nebula? A. An elliptical flattened disk begins. B. A bulging core with irregular stars around it forms. C. A large flattened core at the center contracts. D. Gases from a dead star gather and contract.

What are 4 things that can happen to a light wave when it hits an object?

Which of the following is NOT a strategy to prevent falls? a. keeping walking surfaces free from moisture and clutter b. replacing damaged electrical cords c. installing handrails for stairs d. keeping a ladder handy for reaching high places

What are a few things that could not be used as evidence?

Examples were friction is not useful