Answer:
The total amount of energy in the system decreases as the bus travels. This situation happens because some of the kinetic energy changes to thermal energy because of friction between the tires and the road.
Explanation:
In an isolated system (= no external forces acting on it), the mechanical energy of the system remains constant:
where U is the potential energy and K is the kinetic energy.
In this case, however, the system is not isolated. In fact, there is an external force acting on the bus: the force of friction. The force of friction acts against the motion of the bus, therefore the bus loses part of its energy, and its total energy decreases. This energy is converted into thermal energy (motion of the molecules of the surface of the road and of the wheel)
Graph A best represents the relationship between pull is doubled, gravity and distance. depends on the mass and the force of gravity. Option A is correct.
<h3>What is Newton's law of gravity?</h3>
Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.
The expression for the gravitational force is given as;
Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.
Decreasing the distance would increase the gravity of the planet.
Gravity is the attraction force that draws two mass-containing objects together. the gravitational distance's strength.
The force of gravity weakens as the distance between the items rises. if the separation is just one-fourth as great as previously. In the graph, the link between pull and doubled is best represented by A.
Hence option A is correct.
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Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
what is ohm's law?
Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.
Mathematically, Ohm’s law can be expressed as,
I ∝V
Introducing the constant of proportionality, the resistance R in the above equation, we get,
I=V/R or V= I×R
Where,
R is the resistance of the conductor in Ohm
I is the current through the conductor in Amperes (A),
V is the voltage or potential difference measured across the conductor in Volts (V).
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Answer:
<h2>I think it's </h2>
<h2>0.8971-?? </h2>
correct me if I'm wrong because thats what my note said
The minimum coefficient of friction to avoid slippage of the coin is 0.23.
<h3>
Minimum coefficient of friction</h3>
The minimum coefficient of friction can determined from the maximum speed of the coin.
ma = μmg
mv²/r = μmg
v²/r = μg
v² = μgr
μ = v²/(gr)
μ = (ωr)²/(gr)
μ = ω²r/g
μ = (7.95² x 0.035)/(9.8)
μ = 0.23
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