Answer
given,
mass of car (m) = 1200 Kg
speed of cur, u = 25 m/s
mass of truck(M) = 9000 Kg
speed of truck, u' = 20 m/s
v = 18 m/s
a) using conservation of momentum
m u + M u' = m v + M v'
1200 x 25 + 9000 x 20 = 1200 x 18 + 9000 x v'
9000 v' = 188400
v' = 20.93 m/s
b) To calculate losses, we will find the kinetic energies before & after collision. Any difference would give us the losses (in energy form).
(K E)₁= (K E)₂+ Losses
losses = (K E)₂ - (K E)₁
=
=
=9038 J
Answer:
The moon is 400x smaller but it's also 400x closer so it looks the same size even though it's not
Explanation:
According to the particle theory, the third theory is that if heated,the particles move faster and then the kinetic energy increases.I think your question relates to fluid friction and it will only increase when an object increases in which will cause it to come intact with more particles.The faster the object moves- The more particles.The greater the attraction between particles or molecules, then the greater the resistance of the molecules to flow past one another.Hope that helped !