Four balls are allowed to fall freely from the top of a tower one after the other after one second interval in each case. The first ball reaches the ground after four seconds. Find the distances between first and second - second and third - third and fourth.
Answers
Answer:
35 , 25 & 15 m
Explanation:
Four balls are allowed to fall freely from the top of a tower one after the other after one second interval in each case. The first ball reaches the ground after four seconds. Find the distances between first and second - second and third - third and fourth.
The first ball reaches the ground after four seconds
S = Ut + (1/2)aT²
U = 0 Fall Freely
a = g
T = 4
=> S₁ = 0 + (1/2)10 * 4² = 80 m
Second ball traveled for 4-1 = 3 sec
=> S₂ = 0 + (1/2)*10 * 3² = 45 m
Third ball traveled for 3-1 = 2 sec
=> S₃ = 0 + (1/2)*10 * 2² = 20 m
Fourth ball traveled for 2-1 = 1sec
=> S₄ = 0 + (1/2)*10 * 1² = 5 m
distances between first and second = 80 - 45 = 35 m
distances between second and third = 45 - 20 = 25 m
distances between third and fourth. = 20 - 5 = 15 m