Question

The acrobat in the picture below starts walking on a 10 m long pole that is balanced on two supports, going from support A to support B. The support B can withstand a maximum weight of 550 N. If the acrobat weights 700 N, how close can he get to the support B without breaking it?

Answer #1

A 3.65 m long pole is balanced vertically on its tip. It starts
to fall and its lower end does not slip. What will be the speed of
the upper end of the pole just before it hits the ground? [Hint:
Use conservation of energy.]

A 20.0 kg wood ball hangs from a 1.30 m long wire. The maximum
tension the wire can withstand without breaking is 500 N . A 0.900
kg projectile traveling horizontally hits and embeds itself in the
wood ball.
What is the largest speed this projectile can have without
causing the cable to break?

A 21 kg wood ball hangs from a 2.0-m-long wire. The maximum
tension the wire can withstand without breaking is 367 N. A 1.2 kg
projectile traveling horizontally hits and embeds itself in the
wood ball. What is the largest speed this projectile can have
without causing the cable to break?
A 31 g dart is shot straight up at 9.6 m/s. At the same instant,
a 20 g ball of cork is dropped from 2.0 m above the dart....

A 600 g steel block rotates on a steel table
(μk = 0.6) while attached to a 1.4-m-long
hollow tube as shown in the figure below. Compressed air fed
through the tube and ejected from a nozzle on the back of the block
exerts a thrust force of 4.0 N perpendicular to the tube. The
maximum tension the tube can withstand without breaking is 50 N. If
the block starts from rest, how many revolutions does it make
before the...

A child is swinging a 330-g ball at the end of a 69.0-cm-long
string in a vertical circle. The string can withstand a tension of
15.0 N before breaking.
(a) What is the tension in the string when the ball is at the
top of the circle if its speed at that point is 3.50 m/s?
_________ N
(b) What is the maximum speed the ball can have at the bottom of
the circle if the string does not break?...

A
man with mass 80 kg begins walking out to the end of a 5 m long
beam that is supported by a hinge attached to a building at one end
and a cable that makes a 30° to the horizontal at the other end.
This cable can withstand 2000N of tension until it breaks.
a) How far can the man walk before the cable breaks?
b) Just when the cable snaps, what is the angular velocity?
Assume the only...

m = 100g mass ball at the end of a
thin rope r = 0.5m long, The ball starts moving while standing
still on the x axis and accelerates clockwise with . If the string
can withstand a maximum tensile force of 5.8 N; a) When does the
rope break? b) How many turns the ball rolls before the rope
breaks. c) What is the acceleration of the ball just before the
rope breaks? (The equation to use: )

Please answer the following. Thank you, I'll rate.
A 500 g steel block rotates on a steel table while attached to a
1.20 m -long hollow tube. Compressed air fed through the tube and
ejected from a nozzle on the back of the block exerts a thrust
force of 4.91 N perpendicular to the tube. The maximum tension the
tube can withstand without breaking is 60.0 N . Assume the
coefficient of kinetic friction between steel block and steel table...

A wrecking ball utilized to knock down structures has a mass of
m=1490 kg and is hanging from a cable of length L= 19 m. It reaches
a maximum speed of v= 18 m/s while traveling in a circular arc in
the direction of the structure.
a) What is the minimum tension in N that the cable must be able
to support without breaking? Assume the cable is massless.
b) If the cable can only support a tension of 10,000...

A steel wire has the following properties: Length = 5.00 m
Cross-sectional area = 4.60×10−2 cm2 Young's modulus = 2.0×1011Pa
Shear modulus = 0.84×1011Pa Proportional limit = 3.60×108Pa
Breaking stress = 11.0×108Pa The proportional limit is the maximum
stress for which the wire still obeys Hooke's law (point B in
(Figure 1)). The wire is fastened at its upper end and hangs
vertically.
A) How great a weight can be hung from the wire without
exceeding the proportional limit?
B)...

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