20% is the amount takin off of the sofa
Answer:
The recoil velocity of the gun is
and is pointing in opposite direction to the velocity of the bullet.
Step-by-step explanation:
Use conservation of linear momentum, which states that the momentum of the bullet (product of the bullet's mass times its speed) should equal in absolute value the momentum of the recoiling gun (its mass times its recoil velocity).
We also write the mass of the bullet in the same units as the mass of the gun (for example kilograms). Mass of the bullet = 0.010 kg
In mathematical terms, we have:

Solution
- The formula for finding the area of a triangle is given below:

- We have been given:

- Therefore, we can find the area as follows:

Final Answer
The area is 5.4cm²
Answer:
Presents
Step-by-step explanation: