Correctly identify what will happpen in the following situations.
An object falling straight down at a speed higher than its terminal speed
An object falling straight down at its terminal speed
An object at the peak of its trajectory after being thrown straight up
An object falling straight down at a speed lower than its terminal speed
which on will......
slow down,speed up, no acceleration, change direction
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To correctly identify what will happen in each situation, we can apply the basic principles of motion and acceleration.
1. An object falling straight down at a speed higher than its terminal speed:
In this case, the object will experience a net upward force due to fluid resistance (air resistance) opposing its motion. As a result, it will slow down, coming closer to its terminal speed. The object will exhibit deceleration since the net force opposes its motion.
2. An object falling straight down at its terminal speed:
At terminal speed, the object experiences a net force of zero because the force of gravity is balanced by the force of air resistance. With no net force acting on it, the object will continue to move at a constant velocity (speed), resulting in no acceleration. Therefore, it neither speeds up nor slows down.
3. An object at the peak of its trajectory after being thrown straight up:
At the peak, the object momentarily comes to a momentary stop before it starts falling back down. The object changes direction from moving upwards to moving downwards. Here, the object experiences acceleration due to the force of gravity acting in the opposite direction to its initial velocity.
4. An object falling straight down at a speed lower than its terminal speed:
Similar to the situation when the object falls at a higher speed, here, too, the object experiences an upward force due to air resistance. This upward force will slow down the object, causing it to decelerate until it reaches its terminal speed. It will not speed up or change direction, only slow down.
Understanding these situations helps us comprehend the effects of forces acting on objects in motion.
what do you think? Why?
I already took, and have taught, the course.