Answer :
Final answer:
It takes b) 10 seconds for an object to reach a speed of 98.1 m/s when falling under the influence of gravity, which is 9.81 m/s².
Explanation:
The subject in question involves calculating the time it takes for an object to reach a certain speed under the acceleration due to gravity, which is 9.81 m/s². When an object falls freely under gravity, it gains a speed of 9.81 m/s for each second it falls, which is equivalent to 980 cm/s per second. Therefore, to reach a speed of 98.1 m/s, you would divide the final speed by the acceleration due to gravity.
98.1 m/s ÷ 9.81 m/s² = 10 s
Hence, it will take 10 seconds for an object to reach a speed of 98.1 m/s, assuming it starts from rest and no other forces are acting upon it (like air resistance).
