- #1
fanie1031
- 12
- 0
1. Small rockets are sued to make small adjustments in the speed of satellites. One such rocket has a thrust of 59N. If it is fired to change the velocity of a(n) 74000kg spacecraft by 54cm/s, howl ong should it be fired? Answer in units of s.
2.
F=deltaP, delta t;
F=mVf-mVi (impulse equals change in momentum);
F=m(delta v,delta t)
So my derivation (if that's a word) is
(m*delta v)/ delta t= net force = mVf-mVi. From there I get the formula in my attempt to solve the problem.
3. I made delta t=mV/F= 74000kg(.054m/s)/ 59N... I think my problem lies in that I don't have the initial velocity... but I'm not sure how to get it.
2.
F=deltaP, delta t;
F=mVf-mVi (impulse equals change in momentum);
F=m(delta v,delta t)
So my derivation (if that's a word) is
(m*delta v)/ delta t= net force = mVf-mVi. From there I get the formula in my attempt to solve the problem.
3. I made delta t=mV/F= 74000kg(.054m/s)/ 59N... I think my problem lies in that I don't have the initial velocity... but I'm not sure how to get it.