3 years ago

Star x has twice the mass of the sun

Physics

1 answer:

Reil [10]3 years ago

4 0

kjsddjbddbv vbfojv djdjdjdjdjdjdjdjdjdj and the

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at a certain moment, an object has an amount of 200 of motion energy and 400 of gravitational potential energyThe object is also

Radda [10]

Answer:

twice as much energy

Explanation:

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2 years ago

A 75-g bullet is fired from a rifle having a barrel 0.540 m long. choose the origin to be at the location where the bullet begin

lyudmila [28]

Part a) The work done by the gas on the bullet is the integral of the force in dx, where x is the distance covered by the bullet inside the barrel with respect to the origin:
$W= \int\limits^{0.540m}_{0} {F} \, dx = \int\limits^{0.540m}_{0} {(16000+10000x-26000x^2)} \, dx =$
$=16000x+10000 \frac{x^2}{2} - 26000 \frac{x^3}{3}$
By substituting the length of the barrel, L=0.540 m, we find the total work done by the gas on the bullet:
$W=16000(0.540m)+10000 \frac{(0.540m)^2}{2} - 26000 \frac{(0.540m)^3}{3} =$
$=8733 J=8.73 kJ$

part b) The resolution of the problem is the same, we just have to use the new length of the barrel (L=0.95 m) inside the final formula, and we find the new value of the work:
$W=16000(0.95m)+10000 \frac{(0.95m)^2}{2} - 26000 \frac{(0.95m)^3}{3} =$
$=12280 J=12.28 kJ$

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3 years ago

A truck skids for a distance of 25 m with the road pushing on its tires with force of 1500 N as its brakes

MakcuM [25]

Answer:-6800J

Explanation: 8.0m x 850N = 6800

Rewritten as a negative when brake/stop -6800

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A car of mass m accelerates from rest along a level straight track, not at constant acceleration but with constant engine power,

lisabon 2012 [21]

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3 years ago

At what point in the swing of the pendulum is the potential energy completely converted into Kinetic energy

artcher [175]

Point a because point a is the highest at potential energy converting into the highest kinetic energy.

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3 years ago

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