A rocket burns hydrazine (N2H4) to rise into the air, gaining speed as it goes.

ID: 541515 • Letter: A

Question

A rocket burns hydrazine (N2H4) to rise into the air, gaining speed as it goes. As it does so, the potential energy of the rocket:

Potential energy increases because the kinetic energy decreases.

Kinetic energy increases as the chemical potential energy in the hydrazine is used up.

Kinetic energy increases because the surroundings are putting energy into the rocket.

Potential energy decreases because it is further from the center of gravity of the earth.

Potential energy stays the same; energy is neither created nor destroyed.

Potential energy increases because the kinetic energy decreases.

Kinetic energy increases as the chemical potential energy in the hydrazine is used up.

Kinetic energy increases because the surroundings are putting energy into the rocket.

Potential energy decreases because it is further from the center of gravity of the earth.

Potential energy stays the same; energy is neither created nor destroyed.

Since hydrazine is an energy-rich compound which is used as a propellant in Rocket. So, the correct option will be

(B) Kinetic energy increases as the chemical potential energy in the hydrazine are used up.

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