The letter "B" is used for magnetic field
Harder. Not compressible(unless using an extremely strong force). Non-metal have more of a chance of breaking than metals.
<em><u>throwing a ball up initially has a lot of kinetic energy because it is moving upwards ( kinetic energy is energy which a body possesses by virtue of being in motion.) this all then get converted to gravitational potential energy, and for a moment it is stationary before it begins to fall again. by the time it has returned again, all the gravitational potential energy has turned back into kinetic.</u></em>
Answer:
Explanation:
Given
Displacement is
of Amplitude
i.e.
, where A is maximum amplitude
Potential Energy is given by



Total Energy of SHM is given by
Total Energy=kinetic Energy+Potential Energy

Potential Energy is
th of Total Energy
Kinetic Energy is
of Total Energy
(c)Kinetic Energy is 


Answer:

Explanation:
Given that
Radius of track = R
Radius of ball = r
The ball can be treated as solid sphere, so
The moment of inertia of ball

When the ball reach at the lowest position then it will have both angular and linear speed.
Condition for rolling without slipping v= ωr
Form energy conservation

v= ωr





