A polyethylene bar (E 5 1.4 GPa, ? 5 0.4) of diameter 80 mm is inserted in a steel tube of inside diameter 80.2 mm and then compressed by axial force P. The gap between steel tube and polyethylene bar will close when compressive load P is approximately:
(A) 18 kN
(B) 25 kN
(C) 44 kN
(D) 60 kN
(C) 44 kN
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Two circular loops are side by side and lie in the xy-plane. A switch is closed, starting a counterclockwise current in the left-hand loop, as viewed from a point on the positive z-axis passing through the center of the loop. Which of the following statements is true of the right-hand loop?
1.The current remains zero. 2.An induced current moves counterclockwise. 3.An induced current moves clockwise.
The direction of a field line at a point in space shows the direction of the force that would act on a body placed at the point
a. True b. False Indicate whether the statement is true or false
An object of 1.0 kg mass is pulled up an inclined plane by a constant force of 10 N that causes a displacement of 0.50 m. The angle of inclination with the horizontal is 30°. Neglect friction and use g = 10 m/s2. What is the work done by the net force on the object along the inclined plane?
A) 4.3 J B) 4.3 kg m/s2 C) 0 J D) 2.5 J
Explain how a POSITIVE acceleration could produce a DECELERATION
What will be an ideal response?