Una bola de boliche de 7 kg se mueve a 3m/s ¿que tan rapido se debe mover una pelota de pinpong de 2.45g de manera que la bola y la pelota tangan la misma energia cinetica?

The speed of ping pong ball is 160.35 m/s

Explanation:

Given that,

Mass of the bowling ball,

Speed of mass 1,

Mass of ping pong ball,

The kinetic energy of a body is given by:

According to given condition, the two balls have the same kinetic energy

is the speed of ping pong ball

So, the speed of ping pong ball is 160.35 m/s. Hence, this is the required solution.

trig 15.3 cos

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.