Answer:
t = 300.3 seconds
Explanation:
Given that,
The mass of a freight train, 
Force applied on the tracks, 
Initial speed, u = 0
Final speed, v = 80 km/h = 22.3 m/s
We need to find the time taken by it to increase the speed of the train from rest.
The force acting on it is given by :
F = ma
or

So, the required time is 300.3 seconds.
A student creates interest in a visualization by contrasting the amount of light and dark. What color element is used?Grayscale
Answer:
The answer is given below
Explanation:
u is the initial velocity, v is the final velocity. Given that:

a)
The final velocity of cart 1 after collision is given as:

The final velocity of cart 2 after collision is given as:

b) Using the law of conservation of energy:

The answer is 60 km. I hope it helps i dont know if this is right or wrong.
Answer:
When same-sized team members are placed on each side of the rope, the sizes of the arrows on both sides remain the same.
Explanation:
This is the answer on Plato