A body released from rest falls with an acceleration of 9.81 m/s2. If the same body is thrown upward, and air resistance is negligible, its acceleration will be Question 11Answera.upward and greater than 9.81 m/s2b.downward and greater than 9.81 m/s2c.downward and less than 9.81 m/s2d.upward and equal to 9.81 m/s2e.downward and equal to 9.81 m/s2
Question
A body released from rest falls with an acceleration of 9.81 m/s2. If the same body is thrown upward, and air resistance is negligible, its acceleration will be Question 11Answera.upward and greater than 9.81 m/s2b.downward and greater than 9.81 m/s2c.downward and less than 9.81 m/s2d.upward and equal to 9.81 m/s2e.downward and equal to 9.81 m/s2
Solution
The answer is e. downward and equal to 9.81 m/s2.
Here's why:
When a body is thrown upward, it is still under the influence of gravity, which pulls it back towards the earth. This force of gravity provides a constant acceleration of 9.81 m/s2 downward, regardless of the initial direction of motion of the body.
So, even when the body is moving upward, it is being slowed down by this acceleration due to gravity. Once it reaches its highest point and starts falling back down, it continues to accelerate at the same rate.
Therefore, the acceleration of the body is always downward and equal to 9.81 m/s2, as long as air resistance is negligible.
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