The time taken by the stone to hit the ground would be 5.12 seconds.
<h3>What are the three equations of motion?</h3>
There are three equations of motion given by Newton
The first equation is given as follows
v = u + at
the second equation is given as follows
S = ut + 1/2×a×t²
the third equation is given as follows
v² - u² = 2×a×s
Keep in mind that these calculations only apply to uniform acceleration.
As given in the problem, a stone is dropped from the helicopter which is ascending at the speed of 19.6 m/s
height(S) = 156.8 meters
initial velocity(u) = -19.6 m/s
acceleration(a) = 9.81 m/s²
By using the second equation of motion given by newton
S = ut + 1/2at²
S = 156.8m ,u= -19.6 m/s , a= 9.81 m/s² and t =? seconds
156.8= -19.6t + 9.81t²
t = 5.12 seconds
Thus, the time taken by the stone to hit the ground would be 5.12 seconds.
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<span>The correct condition in the nucleus are likely to result in an atom undergoing radioactive decay is that </span><span>d. When the attraction of the strong force is greater than the attraction of the electrostatic force. Radioactivity </span><span>is the process when the unstable nucleus loses energy and emits radiation such as the alpha and beta particles.</span>
Answer:
A) the objects attract each other
Explanation:
gravity always pulls no matter what. it does not repel
Answer
given,
mass of ball = 130 g = 0.13 kg
speed = 6.5 m/s
t = 9.5 ms = 0.0095 s
rebound with 42 % of initial kinetic energy
a)
v₂ = 4.212 m/s
b) impulse is equal to change in momentum
I = 1.393 kg m/s
c) Force =
=
F = 146.63 N