Answer:
A single component that can’t be separated
brainliest please ;)
Answer:
1966 J
Explanation:
The work done by the hose on the balloon is equal to the elastic potential energy stored in it:
![W=U=\frac{1}{2}kx^2](https://tex.z-dn.net/?f=W%3DU%3D%5Cfrac%7B1%7D%7B2%7Dkx%5E2)
where
k = 130 N/m is the spring constant
x = 5.50 m is the stretching of the hose before it is being released
If we substitute these numbers into the equation, we find:
![W=U=\frac{1}{2}(130 N/m)(5.50 m)^2=1966 J](https://tex.z-dn.net/?f=W%3DU%3D%5Cfrac%7B1%7D%7B2%7D%28130%20N%2Fm%29%285.50%20m%29%5E2%3D1966%20J)
So, the work done is 1966 J.
Answer:
Force, F = 77 N
Explanation:
A child in a wagon seem to fall backward when you give the wagon a sharp pull forward. It is due to Newton's third law of motion. The forward pull on wagon is called action force and the backward force is called reaction force. These two forces are equal in magnitude but they acts in opposite direction.
We need to calculate the force is needed to accelerate a sled. It can be calculated using the formula as :
F = m × a
Where
m = mass = 55 kg
a = acceleration = 1.4 m/s²
![F=55\ kg\times 1.4\ m/s^2](https://tex.z-dn.net/?f=F%3D55%5C%20kg%5Ctimes%201.4%5C%20m%2Fs%5E2)
F = 77 N
So, the force needed to accelerate a sled is 77 N. Hence, this is the required solution.
I believe that number 2 is A, not sure though.