Which of the following accurately describes an object that is accelerating?
A ball sitting motionless on the floor
A car slows down to turn a corner****
An airplane moving at 500 km/hr
a bike moving backwards at 3 meters/seconds
Right! You are on a roll.
Thank you again!! :)
You are welcome. I believe you get it.
I'm understanding acceleration much better now. I have a few questions on velocity that I need to be checked. :)
The correct answer is: "A car slows down to turn a corner".
To understand why this is the correct answer, we need to understand what acceleration is. Acceleration is the rate at which an object changes its velocity. Velocity includes both the speed and direction of an object.
In the first option, "A ball sitting motionless on the floor," the ball is not changing its velocity, so it is not accelerating.
In the third option, "An airplane moving at 500 km/hr," the airplane maintains a constant speed and direction, so it is not accelerating.
In the fourth option, "a bike moving backwards at 3 meters/second," the bike is changing its velocity because it is moving in the opposite direction, but its speed does not increase or decrease, so it is not accelerating.
However, in the second option, "A car slows down to turn a corner," the car is changing both its speed and direction. It is slowing down, which means its velocity is decreasing, and it is also changing direction to turn the corner. Therefore, it is undergoing acceleration.