Rockets use thrust forces which produces?
Correct answer: B. Variable acceleration
- A. Constant acceleration
- B. Variable acceleration
- C. Constant velocity
- D. Linearly varying velocity
Explanation
Thrust is the force generated by a rocket engine that propels the rocket forward. According to Newton's second law of motion, force is directly proportional to mass times acceleration (F = m * a). In the case of a rocket, the thrust force is generated by expelling high-speed exhaust gases from the rocket engine.As the rocket burns fuel and expels gases, the mass of the rocket decreases, which affects the acceleration. Initially, when the rocket is fully fueled, the mass is higher, and the acceleration is lower. As the fuel is consumed, the mass decreases, resulting in an increase in Therefore, rockets experience variable acceleration throughout their flight. The acceleration changes as the mass of the rocket changes due to fuel consumption.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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