Conservation of Momentum, again :/

[HeyyMarco]

Homework Statement

Valentina, the Russian Cosmonaut, goes outside the ship for a spacewalk, but when she is floating 15m from the ship, her tether catches on a sharp piece of metal and is severed. Valentina tosses her 2.0kg camera away from the spaceship with a speed of 12m/s.
a.) How fast will Valentina, whose mass is now 68kg, travel toward the spaceship?
b. Assuming the spaceship remains at rest with respect to Valentina, how long will it take her to reach the ship.

Homework Equations

Not sure.

The Attempt at a Solution

Not sure.

 

[willem2]

Homework Statement

Valentina, the Russian Cosmonaut, goes outside the ship for a spacewalk, but when she is floating 15m from the ship, her tether catches on a sharp piece of metal and is severed. Valentina tosses her 2.0kg camera away from the spaceship with a speed of 12m/s.
a.) How fast will Valentina, whose mass is now 68kg, travel toward the spaceship?
b. Assuming the spaceship remains at rest with respect to Valentina, how long will it take her to reach the ship.

Part a is no different than the one about the skaters. The camera and the astronaut
will go in opposite directions, so their momentums will have an opposite sign.

b. Valentina moves with constant speed after throwing the camera.

 

[HeyyMarco]

Part a is no different than the one about the skaters. The camera and the astronaut
will go in opposite directions, so their momentums will have an opposite sign.

b. Valentina moves with constant speed after throwing the camera.

Thank you, I'll return with my calculations shortly. :)
Just one question, how will I determine her initial velocity? I am not given her velocity, but only her distance.