Physical science question?

Question

You have probably often traveled in a car that went faster and faster. We say the car is accelerating. Therefore, a good way to think of acceleration is the direction a car travels and _______.

the increasing rate of speed

the amount the car weighs

the friction from the ground

none of the above

Answer 1

If this are the only options... I believe an ok answer will be "none of the above"... Don't forget the acceleration is pretty much just a scalar but not a direction. It only tells you how much you are acceleration by but never where you are going. The only thing that has a direction is a vector which corresponds to the velocity. Also, if the acceleration is at a constant rate then you will have a horizontal line in a (x,y) plane. Then in such case you velocity will be a linear function with a positive slope. So in fact there is an increase of speed at a constant rate but not at an increasing rate! B and C answers are out of the question!

    *  Speed is the rate of change of distance with time.

    * Velocity is the rate of change of displacement with time.

Answer 2

Those are all pretty poor answers but they're looking for "the increasing rate of speed".

Answer 3

none of the above... a good way to think about acceleration is a change in velocity in a given direction