Answer:
momentum of elephant will be more than the momentum of mouse
Explanation:
As we know that momentum is the product of mass and velocity
so we can write it as
![P = mv](https://tex.z-dn.net/?f=P%20%3D%20mv)
here we know that a mouse is moving with speed 1 m/s
let say mass of mouse is m1 so we have
![P_1 = m_1(1 m/s)](https://tex.z-dn.net/?f=P_1%20%3D%20m_1%281%20m%2Fs%29)
similarly now we know that elephant is moving with speed 3 m/s
now let say the mass of elephant is of mass m2 so
![P_2 = m_2(3 m/s)](https://tex.z-dn.net/?f=P_2%20%3D%20m_2%283%20m%2Fs%29)
now we know that mass of elephant as well as speed of elephant both are more than mouse
so momentum of elephant will be more than the momentum of mouse
<h2>
The speed of the rock just before it reaches the water 25.0 m below the point where the rock left your hand is 45.06 m/s</h2>
Explanation:
First let us find the initial velocity,
We have after 8 seconds the displacement is zero,
We have equation of motion s = ut + 0.5 at²
Initial velocity, u = ?
Acceleration, a = -9.81 m/s²
Time, t = 8 s
Displacement,s = 0 m
Substituting
s = ut + 0.5 at²
0 = u x 8 + 0.5 x -9.81 x 8²
u = 39.24 m/s
Initial velocity is 39.24 m/s.
Now this case is similar to case where a rock is thrown at 39.24 m/s downward.
We have equation of motion v² = u² + 2as
Initial velocity, u = 39.24 m/s
Acceleration, a = 9.81 m/s²
Final velocity, v = ?
Displacement, s = 25 m
Substituting
v² = u² + 2as
v² = 39.24² + 2 x 9.81 x 25
v = 45.06 m/s
The speed of the rock just before it reaches the water 25.0 m below the point where the rock left your hand is 45.06 m/s
Answer:
Breaking stress for a wire depends only on material.