A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of 2100 kg/s and the molecules are expelled at 50 m/s. If the above condition is just sufficient to make it rise upwards, the mass of the rocket is
(Assume $g = 10\, ms^2$)
- $12.6 \times 10^5 \, kg $
- $15.5 \times 10^6 \, kg $
- $9.8 \times 10^5 \, kg $
- $10.5 \times 10^6 \, kg $
The Correct Option is D
Solution and Explanation
Top Questions on momentum
- Given below are two statements:
Statement (I): Planck's constant and angular momentum have the same dimensions.
Statement (II): Linear momentum and moment of force have the same dimensions.
In the light of the above statements, choose the correct answer from the options given below: - The momentum of a body is increased by 50%. The percentage increase in the kinetic energy of the body is ______%
- Angular momentum of an e– in first Bohr's orbit is L.
The change in angular momentum if this electron jumps to the second orbit will be - The orbital angular momentum of a satellite is L, when it is revolving in a circular orbit at height h from earth surface. If the distance of satellite from the earth centre is increased by eight times to its initial value, then the new angular momentum will be
- A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the value of: (Given, Planck’s constant = \(6.6 × 10^{–34}\) Js).
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Concepts Used:
Momentum
It can be defined as "mass in motion." All objects have mass; so if an object is moving, then it is called as momentum.
the momentum of an object is the product of mass of the object and the velocity of the object.
Momentum = mass • velocity
The above equation can be rewritten as
p = m • v
where m is the mass and v is the velocity.
Momentum is a vector quantity and the direction of the of the vector is the same as the direction that an object.