a stone is dropped from rest from the top of a tower 19.6 m high. the distance traveled during the last sec of its fall will be
Answers
We can use the formula
[s (nth second) = u + 1/2a (2n - 1)],
(Where u = initial velocity
a = acceleration and s= displacement)
which can easily be derived by subtracting the displacement in (n - 1) seconds from the total displacement in 'n' seconds. (Kinematical equation for displacement in 'n' seconds is s= un + 1/2an²)
Total time taken for stone to fall,
(Here acceleration = g = 9.8m/s²)
19.6 = (0)t + 1/2(g)n²
=> n² = (19.6 x 2)/ 9.8
=> n² = 4
=> n = 2 seconds (total time taken for stone to fall)
Therefore, displacement in last, that is the 2nd second,
S = (0) + 1/2(g) (2(2) - 1)
(Here u = 0, n = 2 and acceleration = g)
=> s = 1/2 x 9.8 x 3
=> s = 14.7m <-- Ans.
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Answer:
The correct answer is -- s = 14.7m <-- Ans.
Explanation:
We can use the formula
[s (nth second) = u + 1/2a (2n - 1)],
(Where u = initial velocity
a = acceleration and s= displacement)
which can easily be derived by subtracting the displacement in (n - 1) seconds from the total displacement in 'n' seconds. (Kinematical equation for displacement in 'n' seconds is s= un + 1/2an²)
Total time taken for stone to fall,
(Here acceleration = g = 9.8m/s²)
19.6 = (0)t + 1/2(g)n²
=> n² = (19.6 x 2)/ 9.8
=> n² = 4
=> n = 2 seconds (total time taken for stone to fall)
Therefore, displacement in last, that is the 2nd second,
S = (0) + 1/2(g) (2(2) - 1)
(Here u = 0, n = 2 and acceleration = g)
=> s = 1/2 x 9.8 x 3
=> s = 14.7m <-- Ans.
a stone is dropped from rest from the top of a tower 19.6 m high. the distance traveled during the last sec of its fall will bettps://brainly.in/question/3216014
Distance is defined to be the significance or length of displacement between positions. note that the distance between positions isn't always similar to the distance traveled between them. Distance traveled is the overall period of the path traveled between positions
The distance of an item can be defined because the complete route travelled by an item. for example. if a car travels east for five km and takes a flip to journey north for another 8 km, the whole distance travelled by means of automobile shall be 13 km.The space of an object may be described as the whole path travelled by using an item. as an example. if a vehicle travels east for five km and takes a flip to tour north for another eight km, the overall distance travelled with the aid of car shall be thirteen km.
a stone is dropped from rest from the top of a tower 19.6 m high. the distance traveled during the last sec of its fall will be
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