What is the kinetic energy (in joules) of a .2 kg softball thrown at a speed of 40 m/sec? (answer should be in correct units)

m = mass of the softball thrown = 0.2 kg

v = speed of the softball thrown = 40 m/sec

K = kinetic energy of the softball thrown = ?

Kinetic energy of an object is given as

K = (0.5) m v²

where m = mass of object  , v = speed of object

hence for softball thrown , kinetic energy is given as

K = (0.5) m v²

inserting the values

K = (0.5) (0.2) (40)²

K = 160 J

hence kinetic energy of the softball comes out to be 160 J

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me