How can a cyclist's acceleration change even if its velocity remains constant?

A car slows down from 27.7 m/s to 10.9 m/s in 2.37 s. What is its acceleration?

If the fundamental frequency of a violin string is 440 HzHz, what is the frequency of the second harmonic?

All of the following are examples of mechanical energy except

The most powerful tugboats in the world are built in Finland. Theseboats exert a force with a magnitude of 2.85 * 10^6N. Suppose one ofthese tugboats is trying to slow a huge barge that has a mass of 2.0 * 10^7kg and is moving with a speed of 3.

With an average acceleration of â1.2 m/s², how long will it take a cyclist to bring a bicycle with an initial speed of 6.5 m/s to a complete stop?

Halley's Comet appears around the sun about once every 76 years. It passes through the part of its orbit nearest the sun in just a few months but then moves out to great distances and takes more than half a century for the rest of its orbit.

In order to hike around a portion of Lake Allatoona, a tour guide determines that he must take his group 150 m east, 60 m north, then 75 m west.

Explain what happens to light when it is refracted at the surface of water.

A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the momentum change during the collision is correct? (There could be more than one correct choice.

Consider the following distribution of objects: a 3.00-kg object with its center of gravity at (0, 0) m, a 4.20-kg object at (0, 6.00) m, and a 1.40-kg object at (1.00, 0) m. Where should a fourth object of mass 7.