Squids are the fastest marine invertebrates, using a powerful set of muscles to take in and then eject water in a form of jet propulsion that can propel them to speeds of over 11.5 m/s. what speed (in m/s) would a stationary 1.60 kg squid achieve by ejecting 0.115 kg of water (not included in the squid's mass) at 3.50 m/s? neglect other forces, including the drag force on the squid. hint m/s

0.25 m/s

Explanation:

This problem can be solved by using the law of conservation of momentum - the total momentum of the squid-water system must be conserved.

Initially, the squid and the water are at rest, so the total momentum is zero:

After the squid ejects the water, the total momentum is

where

is the mass of the squid

is the velocity of the squid

is the mass of the water

is the velocity of the water

Due to the conservation of momentum,

so

so we can find the final velocity of the squid:

and the negative sign means the direction is opposite to that of the water.

truck y has a greater velocity than truck x.