Explanation:
This is because the drag force suffered by the aircraft is proportional to the speed at which it travels. The thrust of the engines prints a speed to the plane and this speed prints a drag force, always reaching an equilibrium point of these two forces where the speed of the plane is constant and the acceleration is equal to zero.
Therefore, by reducing the thrust, the drag force is greater and the plane begins to decrease its speed, until it reaches the point where the new drag force is matched with the new thrust force, giving it a new final speed , without acceleration.
Answer:
The speed of the ball just before it strikes the ground is 15.90 m/s.
Explanation:
Given that,
Height = 109 m
Distance = 75 m
We need to calculate the time
Using formula for horizontal projectile
Where, h = height
Put the value into the formula
We need to calculate the speed of the ball just before it strikes the ground
Using formula of speed
Where, v = speed
d = distance
t = time
Put the value into the formula
Hence, The speed of the ball just before it strikes the ground is 15.90 m/s.
Answer:
See explanation.
Explanation:
The energy density of an electric field is given by
The electric field at a distance due to the electron is
therefore,
putting in values for and we get:
(a).
For
(b)
For
(c).
For
(d).
For
Answer:
C. 80 J
Explanation:
dU = dq + w
dU = -20 J + (-60 J) = -80 J
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