Question

A 48.5-kg block of ice at 0 °C is sliding on a horizontal surface. The initial speed of the ice is 8.24 m/s and the final speed is 4.08 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice, and determine the mass of ice that melts into water at 0 °C.

Answer #1

Mass of ice = 48.5 kg

initial speed =8.24 m/s

final speed = 4.08 m/s

As question mentions very small mass melts, for final Kinetic energy calculation we can take the same mass, m = 48.5 Kg

Initial KE = 0.5 * mv_{i}^{2} = 0.5*48.5*8.24^2
= 1646.5168 J

Final KE = 0.5 * mv_{f}^{2} =
0.5*48.5*4.08^2 = 403.6752 J

Loss of KE = heat generated = 1646.5168 - 403.6752 = 1242.84 J

Let mass of ice that melts be m Kg

So m*334000 = 1242.84

=> m = 0.003721 Kg = 3.721 gram

So *mass of ice that melts = 3.721*grams

I hope help you..

A 41.9-kg block of ice at 0 °C is sliding on a horizontal
surface. The initial speed of the ice is 8.83 m/s and the final
speed is 3.69 m/s. Assume that the part of the block that melts has
a very small mass and that all the heat generated by kinetic
friction goes into the block of ice, and determine the mass of ice
that melts into water at 0 °C.

1. A 36.6-kg block of ice at 0 °C is sliding on a horizontal
surface. The initial speed of the ice is 9.02 m/s and the final
speed is 3.89 m/s. Assume that the part of the block that melts has
a very small mass and that all the heat generated by kinetic
friction goes into the block of ice, and determine the mass of ice
that melts into water at 0 °C.
2. A rock of mass 0.396 kg...

Question 1: A rock of mass 0.453 kg falls from rest from a
height of 23.0 m into a pail containing 0.335 kg of water. The rock
and water have the same initial temperature. The specific heat
capacity of the rock is 1920 J/kg C°. Ignore the heat absorbed by
the pail itself, and determine the rise in temperature of the rock
and water in Celsius degrees.
Question 2: A 33.7-kg block of ice at 0 °C is sliding on...

The speed of a block (weight= 10N) sliding across a
horizontal ice surface decreases at the rate of 1.5 m/s^2 . whats
The coefficient of kinetic friction between the ice amd the
block?

1. A copper block with a mass 1.32 kg is given an initial speed
of 2.7 m/s on a rough horizontal surface. Because of friction, the
block finally comes to rest. Assume that 70.8 % of the initial
kinetic energy is absorbed by the block in form of heat, what is
the change in temperature (in - do not enter units) of the block?
Data: cCu=387
2. A 2.62g aluminum bullet at 32.0°C is fired at a
speed of 275...

A 2.00 kg block sliding on a horizontal surface makes contact
with a spring, compressing
the spring (the other end of the spring is attached to a rigid
wall). At the instant of
contact, the block has a speed of 12.0 m/s. The coefficients
of static and kinetic friction
between the block and the surface are 0.55 and 0.35,
respectively. The spring constant of
the spring is 100.0 N/m.
a) Determine the maximum compression of the spring
b) Determine the...

A 2.5-kg block is sliding along a rough horizontal surface and
collides with a horizontal spring whose spring constant is 320 N/m.
Unstretched, the spring is 20.0 cm long. The block causes the
spring to compress to a length of 12.5 cm as the block temporarily
comes to rest. The coefficient of kinetic friction between the
block and the horizontal surface is 0.25. a) How much work is done
by the spring as it brings the block to rest? b)...

1. A 370-mL spherical flask contains 0.065 mol of an ideal gas
at a temperature of 283 K. What is the average force exerted on the
walls of the flask by a single molecule?
2. A 4.9-kg block of ice at -1.5 ∘C slides on a horizontal
surface with a coefficient of kinetic friction equal to 0.069. The
initial speed of the block is 7.2 m/s and its final speed is 5.5
m/s. Assuming that all the energy dissipated by...

A 4 kg block is sliding at an initial speed of 10 m/s across a
surface, encountering a constant friction force of 9 N. How much
work is done on the block after it slides 20 cm?
How fast is the block moving after sliding 20 cm?
What's the total distance the block travels before coming to
rest?
What is the average power of friction on the block over the time
it takes the block to come to rest?
What...

A hanging object has a mass of m1 = 0.435 kg; the sliding block
has a mass of m2 = 0.880 kg; and the pulley is a hollow cylinder
with a mass of M = 0.350 kg, an inner radius of R1 = 0.020 0 m, and
an outer radius of R2 = 0.030 0 m. Assume the mass of the spokes is
negligible. The coefficient of kinetic friction between the block
and the horizontal surface is ?k = 0.250....

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 16 minutes ago

asked 19 minutes ago

asked 25 minutes ago

asked 25 minutes ago

asked 28 minutes ago

asked 36 minutes ago

asked 47 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago