A59 g arrow is shot straight up into the air with a speed of 25 m/s. it reaches a maximum height of 30.8878 m. find the initial kinetic energy. the acceleration of gravity is 9.8 m/s 2 . answer in units of j.

18.44 J

Explanation:

Kinetic energy is the energy possessed by objects due to the fact that they are moving. It is half the product of the objects mass and the square of its velocity

K.E = 0.5mv²

     = 0.5 * 0.059 kg * (25 m/s)²

     = 18.44 J

0.863333

86%

hope this

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000