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Assume you seated on a wheeled desk chair at your desk. Consider friction forces between the floor and the chair to be negligible. However, the friction forces between the floor and the desk are not negligible. When sitting at rest, you decide you need another cup of coffee. You push horizontally against the desk, and the chair rolls backward away from the desk.
(a) Draw a free body diagram of yourself during the push and clearly indicate which force was responsible for your acceleration.
(b) Compute the reaction force to the force that caused your acceleration?
(c) Draw the free body diagram of the desk and explain why it did not accelerate.
A second force F2 is added to F1 . The resultant of the two vectors has a magnitude of 370 newtons and points along the (a) east/ (b) west line. Find the magnitude and direction of F2.
A box of textbooks of mass 25.3kg rests on a loading ramp that makes an angle a with the horizontal. find the acceleration once the box has begun to move
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 39 degrees above the horizontal. The crate has mass 244 kg .
A small ball rolls off the roof edge with a horizontal speed of 3.2m/s. The ball hits the ground a distance of 12.6m from the building's base. Calculate the hieght of the building
A simple pendulum is swinging back and forth during a small angle, its motion repeating every 1.15 s. How much longer must the pendulum be made in order to increase its period by 0.20 s?
A motor has a constant angular acceleration of 5rev/sec2. If the motor goes from low speed of 1200RPM tohigh speed in 5 seconds, what is the high speed
a russian submarine and a us submarine move toward each other during maneuvers in motionless water in the north
A light source for light scattering has a resistance of 160Ω. A DC voltage of 100 Volt is attached across it. Find the current through the source
Two lenses that are 35 cm apart are used to form an image. Lens 1 is diverging and has a focal length of f1= -7.0 cm; Use a ray diagram to find the approximate location of the final image
double stranded dna molecule negatively charged with a charge density of -e per nanometer1. what is the electric field
A vibrating string has a fundamental frequency of 224 Hz. The tension is then increased by a factor of2.4. What is the new value of the fundamental frequency
Assuming that the disks form a circular parallel plate capacitor and the electron are initially at rest when they pass through the first disk. A) determine the acceleration that the electrons undergo and B) the speed of the electrons as they pass ..
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