Afly with a mass of 0.0025 kg flies at a rate of 20.0 m/s. what is the kinetic energy of the fly?

answers are:
0.050 j
0.025 j
0.50 j
1.0 j

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Describe uniform velocity and variable velocity in short