How long will it take a car to speed up from 10m/s to 34m/s if it can accelerate 8m/s/s in the direction it is moving?

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy