A steel lift column in a service station is a solid cylinder 4.0 m long and 0.20 m in diameter. Young's modulus for this steel is 20 × 1010 N/m2. By what distance does the column compress when a 5000-kg truck is on it?
A) 4.7 × 10-7 m
B) 8.0 × 10-7 m
C) 3.2 × 10-6 m
D) 7.8 × 10-6 m
E) 3.1 × 10-5 m
Answer: E
You might also like to view...
A stationary 1.67-kg object is struck by a stick. The object experiences a horizontal force given by F = at - bt2, where t is the time in milliseconds from the instant the stick first contacts the object
If a = 1500 N/(ms) and b = 20 N/(ms)2, what is the speed of the object just after it comes away from the stick at t = 2.74 ms? A) 3.3 m/s B) 22 m/s C) 3.7 m/s D) 25 m/s
The orbits of most comets:
A) are like the planets, fairly circular and in the ecliptic plane. B) lie almost entirely beyond the orbit of Neptune. C) have perihelions within the orbits of Mercury. D) go no farther out than Pluto, then return to the Sun again. E) are shorter than the 76 year period for Comet Halley.
Consider a wire in a magnetic field, as shown in the following figure, with a current flowing through it. What will happen to the wire?
a.
The wire will be forced toward the north pole.
b.
The wire will be forced perpendicular to the plane of the magnetic field.
c.
The current will cease flowing.
d.
Nothing will happen.
If a constant net force is applied to a body, the body is
1) accelerating. 2) moving at constant speed. 3) at rest or moving at constant velocity. If a body is moving at constant velocity, it must have 4) a constant net force acting upon it. 5) constant non-zero acceleration. 6) constant speed. 7) none of the above.