C i’m pretty sure but don’t take me as your first answer i just need to answer a question to ask one.
The atomic procedure clarifies why this is the situation is beginning from carbon ( the nuclear number is 6), the most widely recognized atomic responses include the combination of an extra helium core. I hope the answer will help you.
Reflection-----------------------------
Answer:
-0.4454 Joules
Explanation:
m = Mass of block = 2 kg
h = Height of extension = 17 cm = x
g = Acceleration due to gravity = 9.81 m/s²
Potential energy of the spring

The kinetic energy of the spring

In this system as the potential and kinetic energy is conserved from work energy equivalence we get

The work done by friction is -0.4454 Joules
Answer: 8.242 × 10 exp -8 N
Explanation: F = G *m* M/r^2
r = √(13-5)^² + (51-15)^² + (0-0)²
r = 8; the distance between the masses
G =6.673 × 10 -¹¹ Nm²kg-²
F = gravitational force of attraction of m(51kg) on M {1550kg)