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a 200g mass lying on a frictionless table is attached to a horizontal spring with a spring constant of 400 N/m. The spring is stretched a distance of 40 cm (0.40m). what is the initial potential energy of the system? what is the kinetic energy of the system when the mass returns to the equilibrium position after being released?
A pitcher throws a baseball vertically upward with an initial speed of 15.0 m/s, releasing the ball when it is 2.00 above the ground, How long is the ball in the air
What is the maximum amount of energy the incident electron can lose in elastically in this collision? What is left over energy of the electron.
In a local bar, a customer slides an empty beer mug down the counter for a refill, With what velocity did the mug leave the counter
a cylinder has an inner radius of 3.50 cm and a height of 58 cm and is filled water. What is the volume of water and what is the mass of the water
Three dogs are pulling on a blanket in different directions. The English shepherd is pulling north with a force of 40 N. in what direction is the boxer pulling
A container ship leaves port A and heads due west with an average speed of 18.0 knots (1knot=1.852 km/hr). what are its average speed and average velocity
A solid (cylindrical) flywheel of mass m and radius r is initally at rest. A force F acts tangentially on its perimeter for a time t. Show that its angular velocity at t = 2Ft/mr . Illustrate what is its angular displacement during that time?
Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal gravity during the flight. How far will it travel in so doing
an object moving with uniform acceleration has a velocity of 10.0 cms in the positive x-direction when its x-coordinate
a 4.0 kilogram cart moving to the right and a 6.0 kilogram cart moving to the left on a horizontal frictionless
A particle moves on the x axis under the influence of the force F = ?/x3. The initial position is x0, and the initial velocity is 0. [Data: mass = 1 kg; ? = 2 N m3; x0 = 3 m. ]
A closed box is filled with dry ice at a temperature of ?78.4 °C, while the outside temperature is 22.8 °C. Find the thermal conductivity of the material from which the box is made
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