Question

10. A ball of copper has a volume of 2.5X10-4m3. The ball is attached to a steel wire that is 2m long and suspended from the ceiling. The wire has a radius of 3mm. a) What is the mass of the copper ball? (2pts) b) How much does the steel wire stretch due to the copper ball attached? (3pts)

Answer #1

A small ball is attached to one end of a spring that has an
unstrained length of 0.257 m. The spring is held by the other end,
and the ball is whirled around in a horizontal circle at a speed of
3.15 m/s. The spring remains nearly parallel to the ground during
the motion and is observed to stretch by 0.0138 m. By how much
would the spring stretch if it were attached to the ceiling and the
ball allowed...

A small ball is attached to one end of a spring that has an
unstrained length of 0.248 m. The spring is held by the other end,
and the ball is whirled around in a horizontal circle at a speed of
3.05 m/s. The spring remains nearly parallel to the ground during
the motion and is observed to stretch by 0.0104 m. By how much
would the spring stretch if it were attached to the ceiling and the
ball allowed...

A wire consists of a steel center, 1mm in diameter, and a copper
sheathing that is 2 mm in diameter (with a 1 mm inner diameter
where the copper is fused to the steel). What is the resistance of
a 10 meter-long piece of this wire, and how much current and how
much power is dissipated in this wire if attached across the
terminals of a 12-volt battery? Hint: are the copper and steel
components of the wire in series...

A 10-cm-long spring is attached to the ceiling. When a 2.0 kg
mass is hung from it, the spring stretches to a length of 15
cm.What is the spring constant k? How long is the spring when a 3.9
kg mass is suspended from it?

1. A block weighs 15 N and is suspended from a spring that is
attached to the ceiling. The spring stretches by 0.075 m from its
unstrained length. By how much does the spring stretch when a 29-N
block is suspended from it?
x =Number ____ Units ____
mrad/sNradrad/s^2m/sNo unitss
2. An object in simple harmonic motion has an amplitude of 0.216
m and an oscillation period of 0.620 s. Determine the maximum speed
of the motion.
vmax = ____...

A ball of mass of 10 kg is attached to one end of a string. The
other end of the string is attached to the ceiling. The ball swings
and undergoes 5 full oscillations in 18.00 seconds.
(a) Calculate the length of the string.
_____ m
(b) If the amplitude of motion of the pendulum is 15,
calculate the total energy of the oscillator.
_____ J

a 20.00-kg box is attached to a light string that is wrapped
around a cylindrical frictionless spool of radius 15.0 cm and mass
of 5.00 kg. The spool is suspended from the ceiling, and the box is
then released from rest a distance 4.50 m above the floor.
What is the acceleration [in m/s2] of the box?
How long does it take [in s] for the box to reach the floor?

A ball has a mass of 112.0 grams and a volume of 102.0 ml. The
ball is placed in a beaker filled with 600.0ml of cranberry juice.
with a density of 1.20g/ml.
a) What mass of juice must the ball displace in order to float?
How do you know?
b) What volume of cranberry juice must the ball displace in
order to float?
c) Does the ball float in the juice? Why?
d) When the ball is placed in the...

A 12 cm long spring is attached to the ceiling. When a 2.4 kg
mass is hung from it, the spring stretches to a length of 17
cm.
(a) What is the spring constant k?
N/m
(b) How long is the spring when a 3.2 kg mass is suspended from
it?
cm

A. What volume (in cm^3) does 5.00 lbs of copper occupy? (
Density of copper= 8.96 g/cm^3 , 1lb=454g)
B. If the diameter of the wire is 1.25 mm, what is the radius in
cm?
C. What is the cross sectional area of the wire in cm^2?
D. Determine the length of the wire in cm.
E. Convert your answer from part (d) to feet. (1in 2.54, 1ft= 12
in.)

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