Question

1. What is the weight of a 1.2kg mass on Earth?

2. How much potential energy is given to a 1.0kg mass when raising it up 1.0 meters (on Earth)?

3. If a 1000kg car doubles its speed from 2m/s to 4m/s, by what factor does its kinetic energy increase?

4.An athlete pushes a 2kg shot put with 20N of force during a throw. How much does it accelerate?

please don't hand write the answers.

Answer #1

How much energy is required to accelerate a spaceship with a
rest mass of 124 metric tons to a speed of 0.565
c?
Hints:
In the acceleration process the energy we have is converted to the
kinetic energy of the spaceship. The classical kinetic energy of an
object is half of the mass multiplied by the square of the
velocity. What is the relativistic form of the kinetic energy?
Every day our Earth receives 1.55×1022 J energy from the
Sun....

How much energy is required to accelerate a spaceship with a
rest mass of 128 metric tons to a speed of 0.581 c? Hints: In the
acceleration process the energy we have is converted to the kinetic
energy of the spaceship. The classical kinetic energy of an object
is half of the mass multiplied by the square of the velocity. What
is the relativistic form of the kinetic energy? Incorrect. Tries
2/20 Previous Tries Every day our Earth receives 1.55×1022...

1. How much energy is required to accelerate a spaceship with a
rest mass of 138 metric tons to a speed of 0.514
c?
2. Every day our Earth receives 1.55×1022 J energy
from the Sun. If we were able to use 0.75 percent of this energy to
accelerate spaceships, then how many missions would be possible in
one year?

1. How much energy is required to accelerate a spaceship with a
rest mass of 120 metric tons to a speed of 0.515 c?
2. Every day our Earth receives 1.55×1022 J energy from the Sun.
If we were able to use 1.05 percent of this energy to accelerate
spaceships, then how many missions would be possible in one
year?

Estimate how much energy would be deposited into the Earth if it
is hit by a ten tonne meteor traveling on an orbit around the Sun
with a semi-major axis of 3.0 A.U. Note: in order to hit the Earth
this meteor can not be in a circular orbit. Consider two cases: At
the point of impact (a) the meteor is traveling parallel and in the
same direction as the Earth’s orbit and (b) the meteor is traveling
parallel and...

How much gravitational potential energy must a 3140-kg satellite
acquire in order to attain a geosynchronous orbit?
The answer to the above question is 1.67x10^11 J.
How much kinetic energy must it gain? Note that because of the
rotation of the Earth on its axis, the satellite had a velocity of
467 m/s relative to the center of the Earth just before launch.
Doing a 1/2mv^2 doesn't get the correct answer. The law of
conservation of energy would state that...

Part A
How much gravitational potential energy must a 3200-kg satellite
acquire in order to attain a geosynchronous orbit?
Express your answer to three significant figures and include
appropriate units.
Answer : (Value) (Units)
Part B
How much kinetic energy must it gain? Note that because of the
rotation of the Earth on its axis, the satellite had a velocity of
469 m/s relative to the center of the Earth just before
launch.
Express your answer to three significant figures...

Mr. Lake pushes a block of mass of 100kg with a force of 120N
across a smooth surface. Mr. Earle pushes the same block in the
opposite direction with an unknown force.
1) If the block accelerates at a rate of 0.7m/s^2, how much
force was Mr. Earle pushing with? (Just give me the magnitude;
don't worry about the direction)
2) If this block is pushed over a distance of 4m, how much work
does Mr. Lake do on the...

A force ?(?) = −5.0?2+7.0? Newtons acts on a
particle.
a) How much work does the force do on the particle as it moves
from ? = 2.0m to ? = 5.0m, in Joules?
b) Find the potential energy due to this force, at position
x = 2, in Joules, by finding the potential energy as a
function of x, U(x). You should use the
reference point of the potential energy being 0 when x = 0.
c) Using either...

1. What potential difference is needed to accelerate a He+ ion
(charge +e, mass 4u) from rest to a speed of 1.1×106 m/s
?
2. Two 2.00 cm × 2.00 cm plates that form a parallel-plate
capacitor are charged to ± 0.708 nC .
a) What is the electric field strength inside the capacitor if
the spacing between the plates is 1.30 mm ?
b)What is potential difference across the capacitor if the
spacing between the plates is 1.30 mm...

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