Answer:

Explanation:
Knowing the potential energy in the spring is equal to the initial kinetic energy so:



Now using the conservation of momentum




Replacing in initial equation so:

Solve to m


Answer:
C. I'm pretty sure because I just took that test but I'm not sure
Answer:
Explanation:
To identify forces acting on an object
1. Draw a closed curve around the system.
2.Identify "the system" and "the environment."
3. Draw a picture of the situation. Which of these are steps used to identify the forces acting on an object?
All of these are correct.
A close loop doesn't allow external forces to act on the system and this only allows the the forces on the object to act alone.
Drawing the free body diagram will show the forces acting on the body.
Also, isolating the system from the environment so that it won't be affected by external forces or resistance
Answer:
This question is hard I will edit my answer when I find the answer
Explanation:
Answer is: <span>the mass of the body is 35 kg.
</span>Newton's second law of motion: F = m · a.
F - <span> force applied.
m - </span><span>mass of the object receiving the force.
</span>a<span> - the acceleration of the object.
</span>F = 350 N.
a = 10 m/s².
m = ?
m = F ÷ a.
m = 350 N ÷ 10 m/s².
m = 35 kg.
<span>One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in direction of the applied force.</span>