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ter 24.0 cm hangs in a horizontal plane, supported at its center by a
vertical metal wire. You find that it requires a horizontal force of
4.23 N tangent to the rim of the disk to turn it by thus twist-
ing the wire. You now remove this force and release the disk from
rest. (a) What is the torsion constant for the metal wire? (b) What
are the frequency and period of the torsional oscillations of the
disk? (c) Write the equation of motion theta (t) for the disk.
1. A Maya bird sits on stretched telephone cable wire. Is the tension in the wire greater than, less than, or equal to the weight of the Maya? Explain your answer. You may include a sketch.
2. In a game of tug-of-war, the team that pushes the ground harder in a horizontal direction wins. Explain why. You may want to include a sketch
-If sound takes 1/3 seconds to move 100 meter in air, find time of the same distance in another medium
- if speed of sound in air equal 300m/sec, find time of sound in the second medium for distance equal 500 meter.
For Nickel, the number density is 8×10^23 atoms/cm^3 and the electronic configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^8 4s^2. The value of saturation magnetisation of Nickel in its ferromagnetic states is : (use μB= 9.21×10^−21 Am^2)
A motorcycle moves with constant acceleration with magnitude 3.0 m/s² from location A to B. If it reaches to B in 1 minute,
A) how far is B from A?
B) how fast is the motorcycle upon reaching B if it started at rest in A?
C) if location C is 2 km from B, and the motorcycle starts to decelerate at constant rate of -1m/s2 the moment it passes point B, can it reaches C? If yes what it is its speed upon reaching C?
Suppose a woman is pushing a grocery cart with 500N force along 7 meters aisle, how much work is done in pushing the cart from one end of the aisle to the others?
1) From 0 to 5 seconds, the object moves with constant velocity at 2m/s
2) From 5 to 8 seconds , the object constantly decelerate at -1 m/s ² (the portion of this graph is parabolic)
3) From 8 to 12 seconds, the object remain at rest
1) From 0 to 4 seconds, the object constantly accelerate at 2m/s ²
2) From 4 to 8 seconds, the object constantly accelerate at -1m/s ²
3) From 8 to 10 seconds, the object moves with constant velocity
4) From 10 to 12, the object constantly decelerate at until it stop
When do you use vernier callipers and mircometer screw gauge instruments?
#339914 on Dec 2023