The breaking stress of a wire depends upon:
1. material of the wire.
2. length of the wire.
3. radius of the wire.
4. shape of the cross-section.
A force F is needed to break a copper wire having radius R. The force needed to break a copper wire of radius 2R will be:
A steel cable with a radius of 1.5 cm supports a chairlift at a ski area. If the maximum stress is not to exceed 108 N/m2, what is the maximum load that the cable can support?
1. 7.06 x 104 N
2. 5.03 x 104 N
3. 1.09 x 104 N
4. 17 x 104 N
The breaking stress of a wire going over a smooth pulley in the following question is 2 × N/. What would be the minimum radius of the wire used if it is not to break?
A light rod of length 2m is suspended from the ceiling horizontally by means of two vertical wires of equal length. A weight W is hung from the light rod as shown in the figure. The rod is hung by means of a steel wire of cross-sectional area and brass wire of cross-sectional area . To have equal stress in both wires, =?
To break a wire, a force of is required. If the density of the material is , then the length of the wire which will break by its own weight will be:
1. 34 m
2. 30 m
3. 300 m
4. 3 m
A uniform wire of length 3m and mass 10 kg is suspended vertically from one end and loaded at another end by a block of mass 10 kg. The radius of the cross-section of the wire is 0.1 m. The stress in the middle of the wire is: (g = 10 )
1. 1.4 x
2. 4.8 x
3. 96 x
4. 3.5 x
lf is the density of the material of a wire and is the breaking stress, the greatest length of the wire that can hang freely without breaking is:
The breaking stress of a wire depends on:
1. Length of the wire
2. Applied force
3. The material of the wire
4. Area of the cross-section of the wire
One end of a uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight W1 is suspended from its lower end. If A is the area of cross-section of the wire , the stress in the wire at a height 3L/4 from its lower end is :-