The distance-time graphs below represent the motion of a car. Match the descriptions with the graphs. Explain your answers 1. the car is stopped
2. the car is traveling at a constant speed
3. the speed of the car is decreasing
4. The car is coming back

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 coefficient of kinetic friction μk between the block and the tabletop?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87