Reference no: EM134901
Q1. One end of a cord is fixed and a small 0.500kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m, When angle=20.0 degrees, the speed of an object is 8.00 m/s. At this instant. Find out-
(a) The tension in the string.
(b) The tangential and radial components of acceleration, and
(c) Total acceleration.
(d) Is your reply changed if the objects are swinging down toward its lowest point instead of swinging up?
Q2. Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket?
Q3. A converging lens (f = 12.0 cm) is held 7.80 cm in front of a newspaper, print size of which has a height of 2.30 mm. Find out-
(a) The image distance (in cm) and
(b) The height (in mm) of the magnified print.
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What is torque exerted about the center of the disk
: A disk of radius R = 9 cm is pulled along a friction less surface with a force of F = 15 N by a string wrapped around the edge. At the instant when d = 28 cm of string has unwound off the disk, what is torque exerted about the center of the disk.
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What was the mass of the ice cube
: A cube of ice is taken from the freezer at -8.0°C and placed in a 97 g aluminium calorimeter filled with 286 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of the ice cube.
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How much does it expand in length between winter and summer
: The George Washington bridge, that spans the Hudson River between New York and Jersey, is 4670 feet long and is made out of steel, How much does it expand in length between winter and summer.
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Establish its length as measured by a person on earth
: The pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth.
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The acceleration of the second rocket
: Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
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What is the focal length of this mirror
: What is the focal length of this mirror. If the object is 25 cm in front of the mirror, what is the image distance.
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What is strength of the magnetic field
: The path of an electron, travelling at 3.7 × 104 meters/second, is making the right angle to a magnetic field. A single electron experiences a force of 2.2 × 10-15 Newton's while in the field. What is strength of the magnetic field .
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What is the greatest velocity of this mass
: A 4.70 kg mass causes a vertical spring to stretch 0.850 meters. The spring is after that stretch and extra 0.270 meters and release (as a stopwatch starts) causing the spring and mass to oscillate.
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What is the tension in the string
: It's found that string is set into oscillation only at the frequency 880 Hz and 1320 Hz as the frequency of an oscillator is varied over the range 500-1500 Hz. What is the tension in the string.
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