Given the following statements, which describe best an object
with increasing kinetic energy? I. A ball...
Given the following statements, which describe best an object
with increasing kinetic energy? I. A ball dropped from 10 meters
II. A ball thrown vertically upwards III. A tennis ball rolling
across the court
If a ball falls in vacuum from a certain height describe the
total energy, the kinetic energy, and the potential energy during
the fall. Describe the energy values at the initial point (highest
point), at an intermediate point during the fall, and at the final
point (ground level). Make sure to mention how the free fall in
vacuum is different from a real life fall.
Which of the following statements is true about life?
A) An object that uses energy is by definition, alive
B) All living organisms reproduce sexually
C) All living organisms have the capacity to grow
1.When the mass of an object is the same, is the total momentum and kinetic energy preserved? The reason is that?
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2. When the mass of the object is different, is the total momentum and kinetic energy preserved? The reason is that?
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3. When two objects collide, is the amount of impact received by the two objects the same? The reason is that?
Compare and contrast the relativistic and classical expressions
for the kinetic energy of an object.
How does the relativistic expression explain the impossibility
of an object to reach the speed of light?
Answer the following questions:
1. An object with mass M and velocity V has kinetic energy K=
1/2MV^2. If the velocity of the object is reduced to 1/5V, then its
new kinetic energy is: a)1/5K b) 5K c)1/25K d) 25K
2. Velocity is a vector, therefore it has magnitude and
direction. In a circular motion, the change in magnitude and
direction of velocity respectively produce: a) centripetal
acceleration and tangential acceleration b) tangential acceleration
and centripetal acceleration c) tangential force...
1.What is the unit for kinetic energy?
2.A collision in which kinetic energy is conserved is called
what?
3. It takes no work to hold a cheerleader in the air, as shown
here. If no work is done by the cheerleaders, why do they
eventually tire?
A.The concept of work, as it apples in physics, does not apply
to any process that involves people.
B.Their bodies expend chemical energy as their muscles
function; this is "hard work," but not the...
2.
Describe Kinetic Energy and Potential Energy. Describe the Law on
Conservation of Mechanical Energy. If an object that is thrown
perpendicular to the ground by neglecting the friction is required
to go up to 125 m height, what should be the initial velocity of
the object? Take the acceleration of gravity 10 m / s and assume
that the mass of the object does not change.
1)
can an object bothbhave kinetic energy and gravitational energy at
the same time? Explain.
2)if an object has 6J of gravitational energy, in what process
can it do 6J of work?
3) if a spring has 6J of elastic energy, in what process can
it do 6J of work?
Please help me answer the previous questions( I will give a
good rating) thank you!
in which one of the following substances is the kinetic energy
the smallest compared to the intermolecular (interparticle)
attractive forces?
H2O(l)
NaCl(s)
CO2(s)
CO(g)
CH3OH(l)