Answer is gravitational force, according to e2020. Just took the review
The answer is letter A or 'top'
The angular velocity of the disk must be 2.25 rpm
Explanation:
The centripetal acceleration of an object in circular motion is given by
where
is the angular velocity
r is the distance of the object from the axis of rotation
For the space station in this problem, we have
is the centripetal acceleration
The diameter of the disk is
d = 175 m
So the radius is
So, a point on the rim has a distance of 87.5 m from the axis of rotation. Therefore, we can re-arrange the previous equation to find the angular velocity:
And this is the angular velocity of any point along the disk. Converting into rpm,
Learn more about circular motion:
#LearnwithBrainly
slope, which is 29 m above the bottom of the dip?
Answer:
20.5m/s
Explanation:
neglecting friction the amount of energy at the bottom equals to the amount of energy at top. Lawofconservationofenergy.
ME=P.E+k.E
ME= mgh+ 1/2mv*v
ME = (m* 10 *49)+(1/2m(4.6*4.6))
MEtop=500.98m
MEbottom=MEtop: in order to obey the law of conservation of energy
MEbottom=mgh+ 1/2mv*v
500.98m=m*10*29+1/2m v* v
500.98m= m(290+1/2v*v) ...cancel m by m
500.98-290=1/2v*v criss cross multiple
210.98*2=v*v
v=√421.96
v=20.5 m/s