Question

Which is not a way to accelerate an object? a. speed it up b. slow it down c. change its direction d. apply balanced forces

Answer 1

Acceleration is \(any\) change in velocity. Velocity has two components, a magnitude, which we call speed and a direction. So, these are the only two ways acceleration acceleration can be "created" or changed.

If we slow down or speed up, we are \(changing\) velocity, so this means acceleration. Acceleration can be negative, which happens when we slow down, that is, speed decreases. It's more natural to say "deceleration" but this is the same thing as negative acceleration.

If we go at a constant speed we do not acceleration, \(unless\) we are changing \(direction\), which is the only other way to do it. For example, if you go at constant velocity around a merry-go-round your speed is not changing, but your direction is constantly changing. So, you are accelerating.

If you are on a see-saw with a friend and you are both balancing, and there is no movement, there is no acceleration. Acceleration requires changes in velocity or direction, neither are occurring in this instance. So the answer should now be obvious.

Answer 2

d

Answer 3

that's right

Answer 4

thanks!! it is greatly appreciated

Answer 5

np