Aball with a mass of 0.50 kilograms is moving at a speed of 1.8 meters/second along the positive x-axis. it collides with another ball of the same mass travelling at a speed of 2.0 meters/second toward the positive y-axis. both balls then start moving together. what is the magnitude of the resultant momentum before collision?

1.35 kg m/s

Explanation:

The law of conservation of momentum states that the total momentum before and after the collision is conserved, therefore:

we can calculate the total momentum before the collision, , since we know the masses and the initial velocities of the two balls.

The momentum along the x-axis is given only by the first ball, since the second one is moving on the y-axis:

The momentum along the y-axis is given only by the second ball, since the first one is moving on the x-axis:

So, the magnitude of the resultant momentum is

And since the total momentum after the collision is equal to the momentum before the collision,

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min