Answer:
The answer is mass .
Explanation:
The kinetic energy formula is :
So if the mass is higher, the kinetic energy gained is higher .
The answer is B hope this helps
Answer: The recoil speed is - 8.9604. m/s.
Explanation: According to the Third Law of Newton, every action has an oppsite and equal reaction, and the Second Law of Newton, Force=mass·acceleration. Acceleration is a variation in velocity by any given time, so Force = mass·velocity·time.
Combining the two laws, there is : m1·v1 = - m2·v2. This is the Law of Conservation of Momentum.
Substituting and calculating:
v2 = - () · v1
v2 = - · 5.24.
v2 = - 8.9604.
The recoil speed of the thorium nucleus is - 8.9604.m/s.
vf=vi-gt (at peak vf = 0)
vi=gt
44=9.8t
t=4.49 s
time return = time upward = 4.49 s