Momentum and CollisionHardBloom L3
Question
A rocket of mass 4000 kg is set for vertical firing. How much gas must be ejected per second so that the rocket may have initial upwards acceleration of magnitude 19.6 m/s2.
[Exhaust speed of fuel = 980 m/s.]
Options
A.240 kg s–1
B.60 kg s–1
C.120 kg s–1
D.None
Solution
Sol.
Initial ⇒ mass = 4000
μvrel – mg = ma
μ × 980 – 4000 × 9.8
4000 × 19.6
⇒ μ = 40 + 80 = 120
Create a free account to view solution
View Solution FreeMore Momentum and Collision Questions
An open water tight railway wagon of mass 5 × 103 kg coats at an initial velocity 1.2 m/s without friction on a rai...A U-tube is partially filled with water. Oil which does not mix with water is next poured into one side, until water ris...The graph shows the extension of a wire of length 1m suspended form the top of a roof at one end and with a load W conne...Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio 1 : √2. If they ar...A ball strikes a smooth horizontal ground at an angle of 45° with the vertical. What cannot be the possible angle of its...