All you need to do is to convert the velocity to meters per hour. Then multiply by 0.4 hours. I guess the answer was rounded up.
The answer is C, because they moved from a stand still to down the hill
Answer:
There would be 9 b/c there is so many hours of school and the homework depends on how old you are so i am pretty sure it is C.
Explanation:
Unsaturated solution. It has more capacity to hold more solute.
Answer:
The force of impact, F = 17682.18 N
Explanation:
Given,
The initial velocity of the truck and associated velocity of RV, u = 2 m/s
The height of the cliff, h = 280 ft
= 85.344 m
The mass of the RV, m = 1800 Kg
The total energy of the RV at height, 'h' with velocity, 'v', E = P.E + K.E
P.E = mgh J
= 1800 x 9.8 x 85.344
= 1505468.16 J
K.E = mv²/2
= 1800 x 2² / 2
=3600 J
Therefore total energy, E = 1509068.16 J
This is equal to the kinetic energy of RV at the impact.
The force of impact,
F = E/h
= 1509068.16 J / 85.344 m
= 17682.18 N
Hence, the force of impact of RV is, F = 17682.18 N
