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A 1100- kg car rolling on a horizontal surface has speed v= 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring?
A cube of metal has a mass of 0.347 kg and measures 3.13 cm on a side. Calculate the density and identify the metal
A small but measurable current of 7.70 E-10 A. exists in a copper wire whose diameter is 0.05 cm. Calculate the electron drift speed (in meters/second)
A 54-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s, determine her altitude as she crosses the bar
A typical car weighs about 3500 lb. what is the approximate edge size of the square area with which each tire contacts the ground
Determine the magnitude of the force on an electron traveling 7.85×105m/s horizontally to the east in a vertically upward magnetic field of strength 0.44T
A star with the same mass and diameter as the sun rotates around a central axis with a period of 28.8 days. What would be the new rotation period of the star
A cart of mass M = 1.2 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.5 kg. The cart is released from rest, allowing it to roll, pulled by falling h..
A projectile is fired from the ground (you can assume the initial height is the same as the ground) in a field so there are no obstacles in its way. What is the maximum height that the projectile reaches
An artificial earth satellite has a circular orbit of radius 5.91 106 m (which means it is orbiting approximately -450 km above the surface of the earth) in an equatorial plane. Find the satellite's instantaneous acceleration at time t. Magnitude? ..
Biometric measurements indicate that each hand typically makes up about 1.25% of body weight. What horizontal force should her wrist exert on her hand.
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 ?C and rejects heat to a room of temperature 21.5?C, How much energy must be supplied to the device
A light rope passes over a light, frictionless pulley. One end is fastened to a bunch of bananas of mass M, and a monkey of mass M clings to the other end. Will the monkey reach the bananas
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