Answer:
Explanation:
Two sphere have same mass and radius but one is solid and another is hollow
Moment of inertia is the distribution of mass about the axis of rotation
For Hollow sphere more mass is at outside therefore its moment of inertia is more than solid sphere
Answer:
Explanation:
The equation for terminal velocity is , where m is the mass of the sky diver, g the gravitational acceleration,
the air density, A the effective cross-sectional area and
the drag coefficient.
It will be easier if we write this as and realize that for both situations the right hand side of that formula will be the same. This means that
, so the ratio of the effective cross-sectional area A in the slower position (
for
) to that in the faster position (
for
) will be
The complete question is as follows:
A 0.150-kg toy is undergoing SHM on the end of a horizontal spring with force constant k = 300 N/m. When the toy is 0.0120 m from its equilibrium position, it is observed to have a speed of 0.400 m/s.
Answer:
The correct answer is 0.034 J.
Explanation:
Given :
mass of the toy is m = 0.15 kg.
The force constant of restoring force k = 300 Nm⁻¹
When the position of the toy from the equilibrium is x = 0.012m, then the
speed of the toy vx = 0.4m s
The total mechanical energy in SHM is given by
E= 1/2 (mv²+ kx²) = 1/2 kA²
(here, m = mass of the object, vx = velocity, k = force constant
of restoring force, and A = amplitude of SHM.)
Hence by substituting the numerical values in equation 1, we get
= 0.034 J
Thus, the correct answer is 0.034 J.