A rocket being thrust upward as the force of the fuel being burned pushes downward is an example of which of Newton's laws?
2 answers:
A rocket being thrust upward as the force of the fuel being burned pushes upward follows the Newton third law on motion.
Further Explanation:
Newton states three laws on motion.
1. The first law expressed as “If a body is in motion remains in motion and in rest remains in rest except an external force is applied on it.”
2. The second law expressed as “The force applied on the object is equal to the change in the momentum of the object per change in the time.”
3. The third law expressed as “If a force applied on the object then equal and opposite force will be applied by the object.”
Concept:
A rocket being thrust upward as the force of the fuel being burned pushes upward follows the Newton third law on motion as when you want to jump on the ground your foot exerts force on the floor downward at that time the equal force exerted by the floor that is opposite in direction on your foot which make you possible to jump.
Similarly the combustion of the rocket's fuel in the presence of the oxygen produces a lot of gasses and that are exhausted through a nozzle this provides a huge amount of force toward the ground that is a huge force is exerted on the ground. According to Newton’s third law the same amount of huge force exerted on the rocket in upward direction that pull the rocket upward in the air continuously which able the rocket to go in the sky.
Learn more:
1. Conservation of momentum brainly.com/question/9484203.
2. Motion under friction brainly.com/question/7031524.
3. Force on refrigerator brainly.com/question/4033012.
Answer Details:
Grade: High school
Subject: Physics
Chapter: Kinematics
Keywords:
Rocket, thrust, upward, fuel burned, pushes, downward, Newton’s law, law of inertia, law of momentum, energy conservation, momentum conservation, force, action, reaction.
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a) Their angular speeds are the same
b) Andrea's tangential speed is twice the value of Chuck's tangential speed
Explanation:
a)
The angular speed of Andrea and Chuck is the same.
Let's call the angular speed at which the merry-go-round is rotating. We know that the angular speed is defined as:
where
is the angular displacement covered in one revolution
T is the period of revolution
The merry go round is a rigid body, so all its point cover the same angular displacement in the same time: this means that it doesn't matter where Andrea and Chuck are located along the merry-go-round, their angular speed will still be the same.
b)
For an object in circular motion, the tangential speed is given by
where
is the angular speed
r is the distance from the centre of rotation
Here let's call the distance at which Chuck is rotating, so his tangential speed is
Now we know that Andrea is rotating twice as far from the centre, so at a distance of
So his tangential speed is
So, Andrea's tangential speed is twice the value of Chuck's tangential speed.
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