Answer:
In first case angular displacement will be 11.55 radian
In second case it will be 4 times the previous case
Explanation:
We have given that machine rotates at an angular velocity of 0.07 rad/sec
So initial angular velocity 
And its speed is increases to 3.4 rad/sec
So final angular velocity is 
Angular acceleration 
According to third equation of motion we know that



Now initial angular velocity and final angular velocity both are doubled but angular acceleration is constant
So 
And 
So 

So angular displacement will be 4 times the earlier displacement
<span>Science
Define</span>A body of knowledge and the process of gaining new knowledge<span>Pseudoscience
Define</span><span>Sometimes a practice or a belief claims to be science, but does not follow specific criteria. Criteria that define true science include scientific experimentation, replication of results,and peer review. Beliefs and claims that do not meet these criteria are called pseudoscience</span>
Answer:
The correct option is;
D) The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut
Explanation:
According to Newton's third law of motion, in nature, for every action, there is an equal and opposite reaction, such that if a first object exerts a certain amount of force on a second object, the second object will exert a force of equal magnitude and opposite direction to that exerted by the first object
Therefore, the gravitational force exerted by Earth on the astronaut, is equal to the force exerted by the astronaut on Earth.
I think this is vectors. Sketch the two vectors A and B on the x axis and then find their magnitudes using cosine... i would like to know if i am correct.