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A uniform beam of negligible weight is supported by a cable. The beam is pivoted at the bottom and a 2000-N object hangs from its top. Find the magnitude of the tension T in the cable.
A 50 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if dancer is lea..
Calculate the gravitational force between Sun and Earth by using Newton's universal gravitation, Does this mean that everything on Earth is heavier at night
A cannon fires a cannonball from the top of a wall at a speed of 25.58 m/s and an angle of 17.44 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
When a 0.2 kg mass is suspended from a vertically hanging spring it stretches the spring from its original length of 0.5 cm to a total length of 6.0 cm. what is the maximum speed of the mass as it oscillates
At a pressure of 0.0760 atm a constant-volume ideal gas thermometer reads a temperature of 345 K. What is the thermometer's triple point pressure, Pt
Initially, an object is 12cm to the left of a convex lens of focal length 8.2cm, then a concave (diverging) lens of local length -9cm is placed 20cm to the right of the convex lens, find the Image distance from concave lens
A block of mass 2.89 kg is pushed 2.20 m along a frictionless horizontal table by a constant 13.0 N force directed 23.0° below the horizontal. calculate the normal force exerted by the table
The latent heat of vaporization of H2O at body temperature (37.0°C) is 2.45E+6 J/kg. how many kilograms of water in the form of sweat have to be evaporated
Suppose a 32.0 kg child sits 1.37 m to the left of center on the same seesaw as the problem you just solved. A second child sits at the end on the opposite side, Find the normal force acting at the pivot point
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. obtain How long is the arm of the centrifuge
The box of a well-known breakfast cereal states that one ounce of the cereal contains 144 Calories (1 food Calorie = 4186 J). what is the heaviest barbell
Football players measure their acceleration by seeing how fast they can sprint 40 yards (37m). For an 76kg player, what is the average power output for this sprint
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