A ball of mass m = 10 kg is lifted up to some height and has 300 J of potential energy. Then the ball is droped. What is its velocity at the bottom of its descent.
What is the balls original height?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

An object is kept at 45 m high and how much time will it take to reach the ground

The space within which a test north pole experiences a force magnetic poles 2. a powerful stream of electrons flowing high above the earth in the ionosphere electrojet 3. a concept to explain the directional nature of a magnetic field field lines 4. coil of wire designed to produce a magnetic field by a current passing through its windings ionosphere 5. that region above the earth's atmosphere where particles exist in an ionized state magnetic field 6. the extremities of a magnet where the field lines tend to converge or concentrate aurora borealis 7. a phenomenon that occurs in the northern latitudes; the northern lights solenoid