At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 3.20 metre per second squred. At the same instant atruck, travelling with a constant speed of 20.0 m/s, overtakes and passes the car. How far beyond its starting point does the car overtakes the truck?

At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 3.20 metre per second squred. At the same instant atruck, travelling with a constant speed of 20.0 m/s, overtakes and passes the car. How far beyond its starting point does the car overtakes the truck?
To push a certain box across a level floor at constant velocity requires that a horizontal force be applied to the box. The magnitude of this force is half as great as the vertical force required to lift the box. Find the coefficient of kinetic friction between box and floor.
A spring is hanging down from the ceiling, and an object of mass m is attached to the free end. The object is pulled down, thereby stretching the spring, and then released. The object oscillates up and down, and the time T required for one complete up-and-down oscillation is given by the equation T = 2sqrt(m/k), where k is known as the spring constant. What must be the dimension of k for this equation to be dimensionally correct?
A penny sits on the edge of a CD and travels through a distance of 1.00 m. What is its angular displacement if it has a diameter of .100 m? (Give answers in radians, revolutions, and degrees)