Answer:
0.4
Explanation:

kinetic energy formula , potential energy is not considered
0.5×0.2×2×2
Answer:
Correct answer letter C.
Explanation:
As we see in this problem, the total linear momentum is conserved, since there are no external forces acting in that system.
So, we can say that
or
Now, the initial momentum is zero, because before the person starts climbing, the system (balloon plus person) are floating motionless, therefore we have:

(1)
We know that M > m, therefore, m/M < 1 and using (1) we can deduce that V(balloon) < v(person).
Finally, we can say that the balloon moves down (because of the minus sign of V(balloon)) and its speed is less than v(person). Correct answer letter C.
I hope it helps you!
Answer:
From plants and animals that die and fall to forests floor
Explanation:
Hope it helps
Mark brainliest
Answer:
The speed of the center of mass of the two carts is 0.103 m/s
Explanation:
It is given that,
Mass of the air track cart, m₁ = 350 g = 0.35 kg
Velocity of air track cart, v₁ = 1.25 m/s
Mass of cart, m₂ = 280 g = 0.28 kg
Velocity of cart, v₂ = -1.33 m/s (it is travelling in opposite direction)
We need to find the speed of the center of mass of the two carts. It is given by the following relation as :


Hence, this is the required solution.