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a falling rubber ball bounces off the floor. the velocity just before it hits the floor is Vi= (2.7m/2) x + (5.2m/s)y. where x and y indicate the x and y components of the initial velocity voctor. just after it hits the floor, the balls velocity is Vf= (2.7m/2) x + (-5.2 m/s) y. the balls mass is 0.038 kg. the ball is in contact with the ceiling for only 1.8 x 10^-3 seconds.
a. what is the change in momentum of the ball from just before to just after it is in contact with the floor ?
What is the strength of an electric field at a distance r from the center, inside the sphere. Assume the sling thrower could gradually increase the speed of the stone.
Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 78..
In a head-on collision, the car stops in 0.23 {rm s} from a speed of 17 {rm m}/{rm s}. The driver has a mass of 77 {rm kg}, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fract..
Two identical balls are traveling toward each other with velocities of -4.1 m/s (ball A) and +9.5 m/s (ball B), Obtain the velocities (magnitude and direction) of balls
At the same time, the stationary trumpeter played the same note. Ballot heard 3.0 beats per second. How fast was the train moving toward him.
If Jessica can accelerate at a speed of 5-m/s^2, how long will it take for her to reach a speed of 30.0 m/s.
A man pulls a crate of mass 75.0 kg across a level floor. He pulls with a force of 180.0 N at an angle of 26.0° above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 130.0 N. If the cr..
What should the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N.
By how much does the ball clear the net. How far below top surface would the medallion appear if the observer (not wearing goggles) and the block were under water.
The position of an object as a function of time is r? =(3.2t+ 0.90 t2)i^+(1.7t? 1.2 t2)j^m, Find the object's magnitude of the acceleration and What is the direction of the acceleration
The frequency of a tuning fork is 358 Hz. Find the length of the shortest organ pipe which will give 6 beats/s with the fork. The velocity of sound in air is 339.1 m/s.
A sealed container of volume 0.10 m^3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium, Calculate the temperature and pressure of the helium gas
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