A race car is traveling a straight track at 130 m/s, when the driver slams on the brake and decelerates" (accelerates in a negative fashion) it at a rate of -25 m.
How long it will take to stop the car?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.