Adart of mass 0.5 kg is pressed against the spring of a dart gun the spring k=300n/m is compressed 10 cm and released. if the dart detaches from the spring when the latter reaches its normal length what speed does the dart acquire?

v = 2.45 m/s

Explanation:

given,

mass of the dart = 0.5 Kg

spring constant of the dart = k = 300 N/m

compressed distance = 10 cm = 0.1 m

speed acquire by the cart = ?

we know,

using conservation of energy

kinetic energy will be equal to spring energy

v = 2.45 m/s

speed acquire by the dart is equal to v = 2.45 m/s

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.