If an object is dropped from rest and is in free fall, what is its velocity at the end of 2seconds?
Answers
Answer:
the velocity is 9.8m/s (due to gravity)
the distance covered is 19.6m
the time is 2s
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Answer:
After 2 seconds its velocity is -19.6 m/s.
Explanation:
If an object is dropped from rest then . . . after 1 second its velocity is -9.8 m/s. after 2 seconds its velocity is -19.6 m/s.
The terms speed and velocity give us an idea of how fast or slow an object is moving. Quite often we encounter situations where we need to identify which of two or more objects is moving faster. The faster of them can be easily determined if they are moving in the same direction on the same road. However, if their direction of movement is opposite, then it is difficult to determine the fastest one. In such cases, the concept of velocity is useful.
According to the meaning of velocity, it can be defined as the rate of change of the object's position with respect to the reference frame and time. It may sound complicated, but velocity basically moves in a certain direction. It is a vector quantity, which means that we need both magnitude (velocity) and direction to define velocity. The SI unit is meter per second (ms-1). If there is a change in the magnitude or direction of a body's velocity, then it is said to be accelerating.
Initial and final velocity
On the other hand, terminal velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration.
How to find the final speed?
Finding the terminal velocity is simple, with a few calculations and basic conceptual knowledge.
Determine the original speed of the object by dividing the time it took the object to travel the given distance by the total distance.
Determine the object's acceleration by dividing the object's mass by the force and multiplying the answer by the time it took to accelerate. For example, if an object weighs 30 kg and a force of 15 N acts on it, then the acceleration would be 4 m/s.
Add the amounts obtained from steps 1 and step 2 to get the final speed. For example, if your initial velocity was 3 m/s and the acceleration of your object is 4 m/s, your final velocity is 7 m/s (3 + 4 = 7).
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