Question 5.9 A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s–2. Calculate the initial thrust (force) of the blast.
Chapter Laws Of Motion Page 110
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2
ANSWER
>>>>>>>>>>>>>>>>>>>>>>>>
INITIAL FORCE = MASS × INITIAL ACCELERATION
Force = Mass × Acceleration
Force = 20000 kg × 5 m/sec ^2
Force = 1,00,000 N
>>>>>>>>>>>>>>>>>>>>≥≥>>>>>>>
ANSWER = 100000 N
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>
INITIAL FORCE = MASS × INITIAL ACCELERATION
Force = Mass × Acceleration
Force = 20000 kg × 5 m/sec ^2
Force = 1,00,000 N
>>>>>>>>>>>>>>>>>>>>≥≥>>>>>>>
ANSWER = 100000 N
>>>>>>>>>>>>>>>>>>>>>>
abhi178:
correct it
Answered by
5
Mass of rocket = 20000 Kg
Initial acceleration = 5m/s² { upward direction }
Let initial thurst of the blast = T
using Newton second law,
Fnet = upward force - downward force
ma = T - mg
T = mg+ ma
= m( g + a)
= m(10 + 5) { g = 10m/s²}
= 15m = 15 × 20000 N
= 300000 = 3 × 10^5 N
Initial acceleration = 5m/s² { upward direction }
Let initial thurst of the blast = T
using Newton second law,
Fnet = upward force - downward force
ma = T - mg
T = mg+ ma
= m( g + a)
= m(10 + 5) { g = 10m/s²}
= 15m = 15 × 20000 N
= 300000 = 3 × 10^5 N
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