What should be the spring constant k of a spring designed to bring a 1500kg car to rest from a speed of 80 m/s so that the occupants undergo a maximum acceleration of 5.0g ?
A 0.50 kg ball that is tied to the end of a 1.3 m light cord is revolved in a horizontal plane with the cord making a 30 angle, with the vertical (See Fig. P7.52.)
Suppose that the mirror described in Part A is initially at rest a distance R away from the sun. What is the critical value of area density for the mirror at which the radiation pressure exactly cancels out the gravitational attraction from the sun?
An electron is at rest just above the surface of a sphere with a radius of 2.6 and a uniformly distributed positive charge of 2.2 10 15 . Like a rocket blasting off from the Earth, the electron is given an initial speed radially outward from the sphere.
The 1.0 kg block in the figure is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2.0 kg block is = 0.450.
you and your bicycle have a total mass of 79.1 kilograms. You accelerate at a rate of 1.79 m/s ^2. Calculate the net force that is accelerating on the object.