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A girl of mass 42 kilogram throws a ball of mass 0.5 kilogram against a wall. The ball strikes the wall horizontally with a speed of 10 m/s, and it bounces back with this similar speed. The ball is in contact with the wall 0.05 second. Obtain the average force exerted on wall by the ball?
a thin double convex lens is to focus the image of an object onto a screen so that the image is life sized. how far is the screen from the object
A uniform electric field of magnitude 410N/C pointing in the positive x-direction acts on anelectron, which is initially at rest. What is the work done by the field on the electron
The net force on the object is not zero in Tubby's frame, but there is an inertial frame in which net force is zero.
question1a 1.0-cm-tall object is 20 rm cm in front of a converging lens that has a 10 rm cm focal length. utilize ray
find the potential difference across the capacitor. A conductor consists of a circular loop of radius R and two straight, long sections. The wire lies in the plane of the paper and carries a current I.
50kg ball tied to the end of a 1.3m light cord is revolvedin a horizontal plane with the cord making a 30 degree angle with the vertical
A railroad boxcar that has " due east" momentum of 15,000 kgm/sec collides with and couples with a similar boxcar that has "due west" momentum of 20,000kgm/sec. After collision, the combination has ( ) kgm/sec total of momentum.
An object is placed 40 cm from a concave mirror of radius 20 cm. Trace the image, show and find the location and characterize the image fully
an inclinced plane mass is .5kg inclinced plane at 30 degrees is 6.40m long, a book has kinetic friction with the incline of .2, find out the speed at the bottom of the incline
A magnifying glass with focal length 15 centimeters is placed 10 centimeters above a stamp. find Where is the image situated
A ball moving at 5ms collides head on elastically with a ball at rest. what are the velocities of the two balls after the collision
The position of a particle moving along an x axis is given by x = 17t2 - 6.0t3, What is the maximum positive coordinate reached by the particle
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