Answer:
Forces, Gravity, Friction, Direction, Acceleration.
Answer:
radius of curvature is 1.2 m
Explanation:
given data
distance u = 30 cm
to find out
radius of curvature
solution
we know radius of curvature is double of focal length
so we find focal length
lens formula for focal length
1/f = 1/u + 1/v ..............................1
so here from magnification
M = - u /v
2 = - u /v )
v = -2u = -2(30)
v =- 60 cm
so from equation 1
1/f = 1/u + 1/v
1/f = 1/30 + 1/-60
f = 60.02 cm
so R = 2f
R = 2( 60.02)
R = 120.04 cm
so radius of curvature is 1.2 m
Answer:
34 m/s
Explanation:
Centripetal acceleration is:
a = v² / r
Given a = 6.55 × 9.8 m/s² = 64.2 m/s², and r = 18 m:
64.2 m/s² = v² / (18 m)
v = 34 m/s
The speed of the centrifuge is 34 m/s.
Tennis ball will move with 1/3 th velocity of plastic ball