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A pitcher pitches a baseball of mass 0.20 kilogram. The ball arrives at home plate with a speed of 40 m/s and is batted directly back to the pitcher with a return speed of 50 m/s.
A) Find the magnitude of the change in momentum of the baseball?
B) If the bat remains in contact with the ball for 0.12 second, compute the average force of the bat on the ball?
A small metal sphere of mass 6.9 g and charge 5.9 μC is firedwith an initial speed of 4.9 m/s directly toward the center of asecond metal sphere carrying charge 7.2 μC. This second sphereis held fixed.
A factory worker pushes a 31.4kg crate a distance of 4.35m along a level floor at constant velocity by pushing downward at an angle of 30.3 degrees below the horizontal. What is the total work done on the crate
A 2.00 m tall basketball player wants to make a goal from 10.0 m from the basket. If he shoots the ball at a 45.0° angle, at what initial speed should he throw the basketball so that it goes through the hoop without striking the backboard.
A wooden plank is 5.00 meter long and supports a 75.0 kilogram block 2.00 meter from one end. find how much force is needed to support each end
a 70 kg object is being pulled up a slope of 35 degrees with the horizontal so that the rope is parallel to the slope.
A commercially available solar cell module puts out 3Volts and 0.1 amp, and measures 5cm by 8cm. How large an array is necessary to provide an output of 40 W?
In a three pulley system a man who weighs 875.0N is standing upright holding on one end of the rope while the other end is tied to his feet. Estimate the normal force from the ground
The drawing shows a parallel plate capacitor that is moving witha speed of 34 m/s through a 4.3-T magnetic field. The velocityv is perpendicular to the magnetic field.
Two infinite lines of charge lie in the x-y-plane, parallel to the y-axis. Line 1 has linear charge density ?1 = 4.2 ?C/m and passes through x = -2.5 cm. compute the magnitude and direction of the electric field
A positively charged particle of mass 7.21E-8 kg is traveling due east with a speed of 85.3 m/s and enters a 0.340 T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 2.30E-3 s, at which time it leaves the fie..
A rock is thrown downward from the top of a 39.8-m-tall tower with an initial speed of 9 m/s. Assuming negligible air resistance, what is the speed of the rock
A rock is thrown from the top of a 30 m building at an angle of 47° above the horizontal. If the horizontal range of the throw is equal to the height of the building, with what speed was the rock thrown
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