When it's dropped and reaches 1/2 of its initial height, it has half as much potential energy. The rest has turned into kinetic energy = <em>49 joules.
</em>============================================================<em> </em> Want to know what else you can figure out ? Watch this . . .
<u> Kinetic energy = (1/2) x (mass) x (speed)²</u>
49 joules = (1/2) x (0.5 kg) x (speed)²
Divide each side by (0.25 kg): 49 joules / 0.25 kg = speed²
Take the square root of each side: 7/0.5 = speed = <em><u>14 meters per second</u></em>
That's the speed of the ball after falling 10 meters ! How cool is that !
. In single particle problem whole mass is concentrated at a single point so it has a single displacement, single velocity and single acceleration. while, in rigid body mass is distributed
A friend snorkeling just below the surface of the water along the same shore will detect the sound first.
Explanation:
The speed of sound in water medium is faster than that through the air.
Sound propagates through the medium by transferring through the molecules on it. Water has more closely packed molecules due to which the speed is faster.
In fact, the sound's speed in water is almost four times faster than that in the air.
So the guy in the water surface gets to hear sound faster than the one in sore.
The achievement of lifting a rocket off the ground and into space can be explained by Newton's third law of motion. What is required for a rocket to lift off into space? Thrust is required for a rocket to lift off into space, ... An object that travels around another object in space is called a satellite.
