Answer:
3
Explanation:
Because the pressure in the air, it’s causes particles to move farther apart from each other.
Well u should know this 24 hours
Answer:
5 m/s
Explanation:
Here we can see there is no external force acted on a two masses when we consider the motion. If there is no external forces then momentum is conserved.
Initial momentum = Final momentum
0.5 × 10 = 1 × V
V = 5 m/s
U=10m/s
acceleration due to gravity=9.8/3=3.27m/s^2
t=12s
s=ut+1/2at^2
s=10(12)+1/2(3.27)(12)^2
s=355.2m
The kinetic energy of the object just after it starts its motion from the Earth surface is
![K= \frac{1}{2}mv^2](https://tex.z-dn.net/?f=K%3D%20%5Cfrac%7B1%7D%7B2%7Dmv%5E2%20)
where m is the object mass and
![v=3.7 km/s=3700 m/s](https://tex.z-dn.net/?f=v%3D3.7%20km%2Fs%3D3700%20m%2Fs)
its initial speed.
When it reaches its maximum height, the object speed is zero and all its kinetic energy converted into gravitational potential energy, which is
![U=mgh](https://tex.z-dn.net/?f=U%3Dmgh)
where
![g=9.81 m/s^2](https://tex.z-dn.net/?f=g%3D9.81%20m%2Fs%5E2)
and h is the maximum height reached by the object.
Since the energy of the object must be conserved, K=U, therefore we can write
![\frac{1}{2}mv^2 =mgh](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7Dmv%5E2%20%3Dmgh)
and we can solve to find h, the maximum height: