After 2.5 seconds of free fall, an item will be moving downhill at a speed of 25 m/s.Option D is correct.
<h3>What is velocity?</h3>
The change of displacement with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
The given data in the problem is;
t(time)= 2.5 s
u(falling velocity)=0 m/sec
v(striking velocity)=? (m/sec)
Newton's first equation of motion:
v=u+at
v=u+gt
v=10 × 2.5
v= 25 m/s downward(+ ve taken as downward)
The velocity of an object that has been in free fall for 2.5 s will be 25 m/s downward.
Hence, option D is correct.
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Answer: 10.75 m
Explanation:
Displacement is how far the dog is from its original position, so use addition
initial + displacement = final
2.50 + 8.25 = 10.75
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