Solution :
Let kg
m/s
Let and
are the speeds of the disk
and
after the collision.
So applying conservation of momentum in the y-direction,
Therefore, the disk 2 have greater velocity and hence more kinetic energy after the collision.
Now applying conservation of momentum in the x-direction,
m/s
So,
= 4.33 m/s
Therefore, speed of the disk 2 after collision is 4.33 m/s
Work done by the crane is 150,000 J
Explanation:
Work done by an object is defined as the amount of energy being transferred from one object to another over a distance by applying force on it.The formula to find work done is work done, W = F d, where F is the force applied and d is the distance at which you applied the force.Given parameters are,
Force applied, F = 1000 N
Distance, d = 150 m
Hence, apply in the formula, W = 1000 X 150 = 150,000 J
Work done by the crane is 150,000 J