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An 30 kg object from rest was pulled horizontally by a pulling force 100 N applied along the direction of displacement line. The coefficient of kinetic friction between the surface and the object is 0.20 and the object was displaced at a distance of 40 meters. How much power consumed during the travel?
Two buckets each of mass 6kg are connected on each of a light inextensible string going over a smooth pulley.A piece of putty of mass 2kg is dropped through a height of 2m into one bucket and becomes attached .Calculate the velocity and the velocity of the system after impact
Spring is compressed to a length of 20 cm by a 20 kg object on a 20 degrees inclined surface with coefficient of kinetic friction 0.30. What is the initial velocity of the object moving up the plane? The spring constant is 980 N/m
A horizontal disc of radius 9.00 cm rotates about an axis which passes vertically through the center of the disc with angular velocity of 100 r.p.m. A small particle of mass 10g is dropped onto the disc and sticks to the edge of the disc. If the angular velocity is reduced to 90 r.p.m, determine the moment of inertia of the disc about the axis.
- An electron is traveling horizontally at a speed of 3.75x106 m/s and enters a uniform electric field. a) What is the magnitude and direction of the electric field that uniformly stops the electron at a distance of 28 mm? b) How much time does it take for the electron to stop? Hint: Use the kinematic equations and Newton’s laws.
For his early morning exercise, Andee jogged 12 times around a
circular track of radius 5.0 m. Find his total distance traveled and
his displacement.
A boy runs a lap around a 200-m track in a time of 30 s.Compute his average speed.
A stream of water gushes from an open pipe at an angle of 15o from the horizontal. If water comes out of the pipe at a speed of 15 m/s, how far from the pipe will the water land?
A ball is thrown upward at an angle of 30o from the horizontal. What are the values of the horizontal and vertical components of its velocity?
A ball is dropped from a window and hits the ground with a speed of 25 ft/s. How high above the ground is the window?
