# Answer on Mechanics | Relativity Question for stacey

Question #54152

An object ejects 12% of its initial mass at time t = 0 along the negative x-axis. The ejected mass has a speed of 2.0 m/s. Shortly after, it ejects another 12% of its initial mass along the negative y-axis with the same speed.

(a) Assume the object started from rest and calculate the magnitude and direction of its final velocity.

magnitude m/s

direction ° counterclockwise from the +x-axis

(b) If the object started at an initial speed

v = (4.0 m/s, 6.0 m/s),

would the change in speed of the object be different than the change in speed in part (a)?

Yes

No

(c) If the object ejected 24% of its initial mass at time

t = 0

in the direction opposite to the direction found in part (a), what would be the magnitude and direction of its final velocity? (Assume the mass is ejected with a speed of 2.0 m/s and the object is initially at rest.)

magnitude m/s

direction ° counterclockwise from the +x-axis

(a) Assume the object started from rest and calculate the magnitude and direction of its final velocity.

magnitude m/s

direction ° counterclockwise from the +x-axis

(b) If the object started at an initial speed

v = (4.0 m/s, 6.0 m/s),

would the change in speed of the object be different than the change in speed in part (a)?

Yes

No

(c) If the object ejected 24% of its initial mass at time

t = 0

in the direction opposite to the direction found in part (a), what would be the magnitude and direction of its final velocity? (Assume the mass is ejected with a speed of 2.0 m/s and the object is initially at rest.)

magnitude m/s

direction ° counterclockwise from the +x-axis

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