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-Write the kinetic, potential and total energy of a baseball having a mass of 0.145kg held at rest 10 meters above the ground.
-The baseball is released. Under the influence of gravity on Earth, it freefalls to the ground. Assuming the air resistance is negligible, write the kinetic, potential and total energy of the baseball at the instant when the baseball hits the earth.
-What is the baseball's final speed when it impacts the ground using the principles of Energy Conservation?
A uniform electric field has magnitude E and is directed in the negative x direction. Calculate the work done on the point charge by the electric field
a molten plastic flows out of a tube that is 8.0 centimeters long at a rate of 13cm^3/min, find the viscosity of the plastic
Two cartons sit next to, and touching, each other on a frictionless horizontal surface. Calculate the contact force between these cartons when a horizontal force of 5.2 N is applied to the light carton
A place kicker should kick a football from a point 34 m (about 37 yd) from the goal, and the ball should clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 26 m/s at an angle of 45 degrees to the horizon..
A person on a trampoline bounces straight upward with aninitial speed of 4.5 m/s. What is the persons speed when she returnsto her initial height
If two alpha particles (each has two protons and two neutrons) are 0.5 meters apart, what is the electric potential energy of the system.
A juggler throws a bowling pin straight up with an initial speed of 8.80m/s. How much time elapses until the bowling pin returns to the juggler's hand?
find at least five internet or magazine articlesadvertisements which depict an exercise or health myth. why do you
A student drops two metallic objects into a 32 g steel container holding 169 g of water at 29C. One object is a 486 g cube of copper that is initially at 58C, and the other is a chunk of aluminum that is initially at 6.9C. To the student’s surpris..
A particular guitar string is supposed to vibrate at 203 Hz, other than it is measured to actually vibrate at 208 Hz. By what percentage must the tension in the string be changed to get the frequency to the correct value.
How long will a radar signal take to complete a round trip between earth and mars when the two planets are 0.7 AU apart.
you swing a 1.65-kg rock tied to a rope in a vertical circle of radius 0.75 m. when the rock reaches the top its speed
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