A 64 kg astronaut floating in space throws a 5.4 kg rock at 3.5 m/sec. How fast does the astronaut move backward?

v₁ = 0.29 [m/s]

Explanation:

This problem can be solved by preserving the momentum. This can be represented by means of the following equation.

where:

m₁ = mass of the astronaut = 64 [kg]

v₁ =  velocity of the astronaut [m/s]

m₂ = mass of the rock = 5.4 [kg]

v₂ = velocity of the rock = 3.5 [m/s]

Now replacing:

false

explanation:

boats, things on boats luggage are way more heavy then water.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be