2. A car traveling at 80 m/s speeds up to 90 m/s in 2 seconds. What is the acceleration of the car?

Explanation:

We want to calculate the acceleration of the car. Acceleration is the change in velocity over the change in time.

The change in velocity is the difference between the final velocity and the initial velocity.

The car speeds up from 80 meters per second to 90 meters per second. Therefore,

Substitute these values into the formula.

Solve the numerator and subtract.

Divide.

The acceleration of the car is 5 meters per second squared.

i think the answer is a, hope this is right, that would be my best guess.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.