Ex. 78 : A wire of length 2 m and radius 0.1 mm stretched by applying a stress of 3 x 10 N/m2 produces extension of 3 x 10 m. Calculate the strain energy in the wire.
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Q: A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other…
A: Mass of box , m = 0.80 kg Spring constant, k = 56 N/m static friction, μs = 0.60
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Q: A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other…
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Q: The springs of a pickup truck act like a single spring with a force constant of k = 1.05 × 105 N/m.…
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Q: A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other…
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Q: ne end of a spring is attached to a fixed wall while a 0.44-kg block is attached to the other…
A: Given: mass of block m = 0.44 kg stretched distance x = 0.8 m force constant of spring k=4 N/m
Q: One end of a spring is attached to a fixed wall while a 0.35-kg block is attached to the other…
A: Given data: Mass (m) = 0.35 kg Amplitude (A) = 0.8 m Spring constant (k) = 5 N/m Required: Speed…
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Q: A pen contains a spring with a spring constant of 240 N/m. When the tip of the pen is in its…
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Q: Part (b) Does increasing the mass at the end increase the maximum speed? O Yes O No
A: Write the expression of maximum speed. vmax=2gL1-cosθ
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Q: The springs of a pickup truck act like a single spring with a force constant of k = 1.15 × 105 N/m.…
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Q: Ex. 67 : A steel wire is acted upon by a load of 10 N. Calculate the extension produced in the wire…
A: To find-Extension produced (l)=?Given-Load (F)=10 NStrain energy(W)=1.1×10-3 J
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Q: mass of 2.5 kg is hung from the end of a vertical spring and eased into equilibrium. The spring…
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- A steel rod 55 cm long has a diameter of 30.0 cm. The compressive strength (the maximum stress it can support without breaking) of this steel is 550.0 × 106 N/m2. What is the compression force that would break the rod? Answer in MN (meganewtons)The figure shows the stress versus strain plot for an aluminum wire that is stretched by a machine pulling in opposite directions at the two ends of the wire. The scale of the stress axis is set by s = 10.5, in units of 107 N/m2. The wire has an initial length of 0.550 m and an initial cross-sectional area of 3.00 × 10-6 m2. How much work does the force from the machine do on the wire to produce a strain of 1.00 × 10-3?A spring with a spring constant of 112 N/m has a mass hung on it so that it stretches 1.2 cm. Calculate how much mass the spring is supporting.
- A mass of 0.40 kg is attached to a hanging spring, stretching it to a length of 0.590 m. If the spring constant is 8.9 N/m, what will be the length of the spring when a mass of 0.82 kg is attached to it?A light elastic string, of natural length 0.8 m and modulus of elasticity 35-4 N, has one end A attached to a fixed point and the other end B attached to a particle P of mass 3 kg. Initially P is held at rest at A. It is then released and allowed to fall. Calculate the speed of P when the length of the string is 1-2 m.Flying Circus of Physics The figure represents an insect caught at the midpoint of a spider-web thread. The thread breaks under a stress of 8.2 x 10 N/m and a strain of 2.00. Initially, it was horizontal and had a length of 3.5 cm and a cross-sectional area of 7.0 x 10-12 m2. As the thread was stretched under the weight of the insect, its volume remained constant. If the weight of the insect puts the thread on the verge of breaking, what is the insect's mass? (A spider's web is built to break if a potentially harmful insect, such as a bumble bee, becomes snared in the web.) Number Units
- One end of a spring is attached to a fixed wall while a 0.36-kg block is attached to the other movable end. The spring is stretched 0.6-m horizontally, then released from rest. Calculate its speed when it goes back to equilibrium if the spring's force constant is k = 5 N/m.A 1.25 m long cable has a diameter 3.50 mm with a Young’s Modulus, E, of 9.75 x 109 N/m2 . When the wire is placed under tension, it experiences a stress of 202.52 x 106 N/m2 , the length of the cable extends by 36.35 mm. Calculate the force that the cable experiences under tension and the strain energy density (U/V) due to deformation. Give your answers in newtons (N) to 2 decimal places for the force; and in joules per cubic metre (J/m3 ) for the strain energy density to 2 decimal places. Assume the cable is solid and the material is homogeneous.The muscle fibers in muscle A have a pinnation angle of 25 degrees, while the muscle fibers in muscle B have a pinnation angle of 20 degrees.Two pennate muscles have the same cross sectional area and produce the same tensile stress. Which muscle can produce a greater amount of force? Muscle B Muscle A Muscle A and B produce the same force