Answer:
option E
Explanation:
given,
Rotational Kinetic Energy, KE_r =
Moment of inertia of the solid,
now,
......(1)
transnational kinetic energy
Total kinetic energy
ratio of rotational kinetic energy to the total kinetic energy
hence, the correct answer is option E
The final speed of the car is 2) 150 m/s
Explanation:
Since the motion of the car is a uniformly accelerated motion, we can solve the problem by using the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance covered
For the car in this problem, we have
u = 10 m/s
s = 7,467 m
Solving for v, we find the final velocity (and speed) of the car:
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Answer:
and
Explanation:
According to Coulomb's law, the magnitude of force between two point object having change and
and by a dicstanced is
Where, is the permitivity of free space and
in SI unit.
Before dcollision:
Charges on both the sphere are and
, d=20cm=0.2m, and
N
So, from equation (i)
After dcollision: Each ephere have same charge, as at the time of collision there was contach and due to this charge get redistributed which made the charge density equal for both the sphere t. So, both have equal amount of charhe as both are identical.
Charges on both the sphere are mean of total charge, i.e
d=20cm=0.2m, and N
So, from equation (i)
As given that the force is repulsive, so both the sphere have the same nature of charge, either positive or negative, so, here take the magnitude of the charge.
The equation (ii) become:
From equation (iii)
So, the magnitude of initial charges on both the sphere are Coulombs
and
Colombs or
.
Considerion the nature of charges too,
and