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Two forces, of magnitude F1=50.0 N and F2=22.0 N, act in opposite directions ona block which sits atop a horizontal frictionless surface as shown. Initially, the center of the block is at position xi=-4.00 cm. At some later time, the block has moved to the right, and its center is at position xf=+6.00 cm. a) What is the work done by force F2 as the block moves from x=xi to x=xf? b) What is the change in the block's kinetic energy as it moves from x=xi to x=xf?
a point charge of 8.00 uc is located on the x-axis at x 4.00 m next to a spherical surface of radius x 3.00 m centered
You walk 30 meter south and 30 meter east. Obtain the direction and magnitude of the resultant displacement both algebraically and graphically
Two blocks hang from either end of a massless rope that runs over a pulley, treated as a thin solid disk, (An Atwood's Machine), and are held in place. Find the unknown mass of the block
Two bullets are fired at the same time with the same kinetic energy. If one bullet has twice the mass of the other, which has the greater speed
A woman is riding a jet ski at a speed of 26 m/s and notices seawall straight ahead. The farthest she can lean the craft in order to make a turn is 22o. find the minimum distance from the seawall that she can begin making her turn and still avoid a..
A proton collides elastically with a stationary deuteron. If the proton is deflected by 37 degrees, what fraction of its kineti energy does it transfer to the deuteron.
If the coefficient of static friction is 0.500, what minimum force magnitude is required from the rope to start the crate moving
The total momentum of two cars approching an intersection is Ptotal = (15,000 kg.m/s)x + (2700 kg.m/s)y. (a) If the momentum of car 1 is P1= (11,000 kg.m/s)x + (-370 kg.m/s)y, what is the momentum of car 2? (b) Does your answer to part (a) depen..
Pete slides a crate up a ramp at an angle of 23.1 degree by exerting a 138 Newton force parallel to the ramp. The crate moves at constant speed. Compute how much work has been done against gravity
A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
Use the free electron model to estimate the gap parameter ?0 and the transition temperature Tc for (a) aluminum (1.81 x 10^29 electrons/m3 ) and (b) zinc (1.31 x 10^29 electrons/m3 ).
Two airplanes leave an airport at the same time. The velocity of the first airplane is 720 m/h at a heading of 12.6 degrees. How far apart are they after 1.8 h
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