Question

A missile of mass 1.20 102 kg is fired from a plane of mass 5.10 103 kg initially moving at a speed of 3.35 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane? HELP I have no idea how to do this

Answer 1

with newton 2nd law:when the jet release gas,impulse created result in an increase in the jet'svelocity:ft=mv=1.201*1.2103=1.454N/s 1.454=5.101(v-3.351) 0.285=v-3.351 v=3.636m/s

Answer 2

When expression exponents, please precede the exponent by the ^ sign.
For example, 10² should be written as 10^2.
102 means one hundred and two, (write 10^2)
103 means one hundred and three, (write 10^3)
Confusions will arise if the numbers are not expressed correctly.