calculate the percentage increase in speed of the cyclist when the power output changes from 200W to 300W

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.)

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?