Answer:
The answer is 49m/s.
Explanation:
Given,
acceleration (a) =9.8m/s^2
initial velocity (u)=0 (as it was in rest condition in helicopter)
time (t) =5 s
now, final velocity (v) after 5s =?
we have,
or, v = 49m/s
Therefore, the velocity after 5s is 49m/s.
<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em>
Answer:
1. Yes, if the elephant is standing still.
2. impulse acting on it.
Explanation:
Momentum is the product of mass and velocity. A change in momentum occurs when any of the quantities change. A change in momentum is equal to impulse acting on it. A change in momentum per unite time generates force.
P = m v
ΔP = Δm v or mΔv
F = ΔP /Δt
Impulse, F Δt = ΔP.
An ant has negligible mass in comparison to an elephant. Thus, an ant can have more momentum only when the elephant is standing still. Then, the momentum of the elephant would be zero as it would have zero velocity. and a moving ant would have more Momentum.
The change in momentum of an object is impulse acting on it.
Impulse, F Δt = ΔP.
The term inertia means a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, and less that state is changed by an external force
