Recent content by wr8899

Because, 10% of mass burned every 340 seconds, so 5% of mass burned every 170 seconds, therefore I got the 0.95

what you mean?

0.95 comes from the final mass over initial mass, since after 170.0 seconds, you have 95% of the original mass left (other 5% mass was burned already)

Homework Statement Consider a rocket in space that ejects burned fuel at a speed of v_ex= 2.0 km/s with respect to the rocket. The rocket burns 10 % of its mass in 340 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 170.0 s? (suppose...

Homework Statement A yoyo of mass m= 2 kg and moment of inertia I_cm= 0.0625 kg m^2 consists of two solid disks of radius R=0.25 m, connected by a central spindle of radius r=0.1875 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed upright on a...