Identify whether the following statements describe a change in acceleration. explain your response.

a. A car stopped at a stop sign.  

d. A person running at 5 meters/second along a curving path

Explanation:

There is acceleration in all cases velocity changes. In options b and c the speed is constant, then there is no acceleration. In option a, the car was moving and then stop, therefore, its speed decrease to zero, and that represent an acceleration. In option d, the magnitude of the velocity doesn't change, nevertheless its direction changes along the curving path (remember that velocity is a vector quantity), therefore, the person receive centripetal acceleration .

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.