Our weight is greater on the Earth<span> because of its stronger </span>gravity. .... track A? (b<span>) Is the speed gained by ball </span>B<span> going </span>down<span> the extra dip the .... The force of friction between your </span>back<span> foot and the </span>floor pushes<span> you forward. .... (a) Two force </span>pairs<span> act; </span>Earth's pull<span> on the apple (</span>action<span>), and the apple's </span>pull<span> on the ...</span>
Answer
given,
angular speed of disk = 32 rad/s
mass dropped, m = 1.3 Kg
radius, r = 0.25 m
new rotational velocity = ?
now,
Initial rotational inertia of the disk
Assuming the mass and the radius of the disk is equal to 7.5 Kg and 0.85 m respectively
now,
Rotational inertia after mass is dropped on it
using angular momentum conservation
I₁ω₁ = I₂ω₂
2.71 x 32 = 2.79 x ω₂
ω₂ = 31 rad/s
new angular velocity of the disk is ω₂ = 31 rad/s
A : 30 seconds
B: T = 2π Square root of√L/g,
C: how many back-and-forth swings there are in a second, measured in hertz. f = [√(4.9)]/6.28 = 2.21/6.28 = 0.353 Hz.
Answer:
Explanation:
F = Magnetic force = 0.018 N
B = Magnetic field = 0.03 T
L = Length of wire = 35 cm
= Angle between current and magnetic field =
Magnetic force is given by
The magnitude of the current is .