Help I don’t understand this question
1 answer:
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Explanation:
Let the mass of two objects be m. Both objects move along the same line in opposite directions. Let v and u₂ are speeds of both objects before collision.
After the collision, both objects stick together and move with the speed of 0.1 V the direction of the velocity of the first mass before the collision.
Using the conservation of momentum as :
On solving above equation,
So, the speed of the second mass before the collision is 0.8 v. The negative sign shows that the it moves in opposite direction. Hence, this is the required solution.
8.854 m/s is the speed of the box after it reaches bottom of the ramp.
<u>Explanation</u>:
From the figure we came to know that height of the block is 4 m.
We know that,
Total "initial energy of an object" = Total "final energy of an object "
Total "initial energy of an object" is = "sum of potential energy" and "kinetic energy" of an object at its initial position.
Initial velocity is “0” as the object does not have starting speed
Total initial energy = 39.2 × m
Now, Total initial energy of an object = Total final energy of an object
Final speed is 8.854 m/s.