Answer: 
Explanation:
Given
The velocities of the protons are 400 m/s and 450 m/s
Mass of the Proton is 
Since they travel in the opposite direction, therefore, their momentum cancels out each other.
Momentum is the product of mass and velocity

The direction of momentum is in the direction of proton having 450 m/s velocity.
Answer:
space is three dimensional
90 degrees - 30 = 60 degrees
Velocity = (5m/s - 4.35m/s x cos(30)) / cos(60)
Velocity = 2.47 m/s
The answer is D) 2.47 m/s at 61.9 degrees
Answer:
<h2>11.91 m/s</h2>
Explanation:
The velocity of an object can be found by using the formula

d is the distance
t is the time taken
From the question we have

We have the final answer as
<h3>11.91 m/s</h3>
Hope this helps you
The concept used to solve this problem is the conservation of momentum and the conservation of energy.
For conservation of the moment we have the definition:

Where,
m = Mass
= Initial velocity for object 1
= Final velocity
Replacing the values we have to,



By conservation of energy we know that the potential energy is equal to the kinetic energy then





Therefore after the collision the height when the combined chinks will go is 1.837m