Taking off by rocket can be explained by:
Correct answer: B. 2nd law of motion
- A. 1st law of motion
- B. 2nd law of motion
- C. Law of conservation of momentum
- D. Law of conservation of energy
Explanation
The second law of motion, formulated by Newton, explains the relationship between an object's force, mass, and acceleration. In the case of a rocket taking off, it follows this law: the force exerted by the rocket's engines propels it upward (action), resulting in the rocket's acceleration (reaction) in the opposite direction. This law precisely describes the dynamics involved in a rocket's propulsion.
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About Force and Motion
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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