Answer:
12 m/s
Explanation:
a = v² / r
78 m/s² = v² / 2.0 m
v = 12.49 m/s
Rounding to two significant figures, the speed is 12 m/s.
<h2>Circular path i.e 1</h2>
Explanation:
If the driver steer into circular path , the acceleration of car will be
acceleration = velocity²/radius of circle
Because the velocity and radius of circle are both constant at all points . Thus the acceleration will also remain constant .
In case 3 and 4 , the radius of path changes . Because velocity is constant . Therefore the acceleration will not remain constant
Answer:
Explanation:
From the question we are told that mass
Thin layer radius 
Generally the expression for ths solution is given as
Xcm =(m*0 =m(-2R))/2m =-mR/(2m)=-R/2
the center of mass will not move at initial state
Considering the center of mass of both bodies


Therefore the enclosing layer moves