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Question: In a Little League baseball game, the 145g ball enters the strike zone with a speed of 15.0 m/s. The batter hits the ball, and it leaves his bat with a speed of 20.0 m/s in exactly the opposite direction.
What is the magnitude of the impulse delivered by the bat to the ball?
If the bat is in contact with the ball for 1.5m/s. what is the magnitude of the average force exerted by the bat on the ball?
A proton, mass 1.67 x 10^-27 kg, is projected horizontally midway between two parallel plates that are separated by 0.30 cm, find minimum speed of the proton that just misses the lower plate as it emerges from the field
Find what the difference between mass and weight as well as the difference between velocity and speed
What does the 2nd law of thermodynamics state? How does this impact devices which generate energy?
A 5 g bullet with speed of 400m/s gets stuck in a 1 kg wooden block (originally not moving). Classify the collision. (b) Find the new speed of block+bullet. (c) Find the amount of kinetic energy lost. Where does it go?
Highway curves are usually banked at an angle θ such that the horizontal component of the reaction force of the road on the car traveling at the design velocity equals the required centripetal force. Find the proper banking angle for a car making ..
A long straight wire has fixed negative charge with a linear chargedensity of magnitude 4.0 nC/m. The wire isto be enclosed by a coaxial, thin-walled, nonconducting cylindricalshell of radius 1.6 cm.
you have a string with a mass of 14.1 g. you stretch the string with a force of 8.49 n giving it a length of 1.97 m.
you throw a ball upward with an initial speed of 4.4 rm ms. when it returns to your hand 0.90 rm s later it has the
q1. a curve of radius 40 m is banked for a design speed of 100 kmh. if the coefficient of static friction is 0.30 wet
A horizontal force of 80N acts on a mass of 6 Kg resting on a horizontal surface. Calculate the total energy expanded in the acceleration
Consider a balloon containing carbon dioxide molecules at room temperature (20degree Celsius) and atmospheric pressure. find the number of molecules in the balloon
in the simulation above the length and orientation of the blue and yellow vectors can be changed by dragging the tips
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