Answer:
Change in momentum of the stone is 3.673 kg.m/s.
Explanation:
Given:
Mass of the ball on the horizontal the surface, m = 0.10 kg
Velocity of the ball with which it hits the stone, v = 20 m/s
According to the question it rebounds with 70% of the initial kinetic energy.
We have to find the change in momentum i.e Δp
Before that:
We have to calculate the rebound velocity with which the object rebounds.
Lets say that the rebound velocity be "v1" and KE remaining after the object rebounds be "KE1".
⇒ 
⇒ 
⇒ 
⇒ 
Joules (J).
Rebound velocity "v1".
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
m/s ...as it rebounds.
Change in momentum Δp.
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
Kg.m/s
The magnitude of the change in momentum of the stone is 3.673 kg.m/s.
I choose the option D.
The velocity is constant, so it’s acceleration is 0 m/s^2.
X = 2 + 15 x 1 + 0 = 17 m
Answer:
<h2>
<em>True</em></h2>
Forests helps in binding the soil together. Thus, prevent soil from erosion.
it's up in Gogle trust me
Note: The answer choices are :
a) Increased
b) Decreased
c) stayed the same
Answer:
The correct option is Increased
The magnitude of the electric field potential difference between the wingtips increases.
Explanation:
The magnitude of the electric potential difference is the induced emf and is given by the equation:
where l = length
v = velocity
B = magnetic field
As the altitude of the airplane increases, the magnetic flux becomes stronger, the speed of the airplane becomes perpendicular to the magnetic field, i.e. 
,
the induced emf = vlB, and thus increases.
The magnitude of the electric field potential difference between the wingtips increases
