when we throw an arrow , we first stretch the string of the bow. while stretching the string of the bow, the work done by us in stretching the bowstring gets stored as potential energy in the bow. This potential energy of the bow is transformed into kinetic energy when the bowstring is released and this gives the momentum and Kinetic energy to the arrow.
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If the skater isn't holding on to anything, and there's no friction between the skates and the floor, then there's no way for any force to reach her and make her start moving.
-- No matter what the bus does, the skater stays right where she is.
-- But at the same time, the bus starts moving forward.
-- So if the bus-driver looks in his mirror, he see the skater moving down the aisle <em>backwards</em>, away from the driver, towards the <em>back of the bus</em>.
The answer is A because t<span>he speed of light is constant in vacuum and unaffected by the speed of the source emitting the light</span>
Answer:
17.71 kgm²s⁻¹
Explanation:
<em>Angular momentum </em>is the rotational momentum , which is quite similar to linear momentum.main difference is that here we consider a rotational motion.
*The total angular momentum of a closed system remains constant.
by definition ,
angular momentum = moment of inertia (I) × angular velocity (ω)
where
<em>ω = 2π × frequency (f)</em> = 2π × 6
<em>angular momentum = 0.47 × 12π = 17.71 kgm²s⁻¹</em>