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OLEGan [10]
3 years ago
8

When an object is solely under the influence of conservative forces, the sum of its kinetic and potential energies does not chan

ge. True or False
Physics
1 answer:
MArishka [77]3 years ago
4 0

Answer:

True

Explanation:

- A conservative force is a force whose work done does not depend on the path taken, but only on the final and starting point.

- The mechanical energy of an object is defined as the sum of the kinetic energy (K) and the potential energy (U): E = K + U

- The law of conservation of energy states that, in case only conservative forces are acting on the object, the mechanical energy of the object E is conserved

- In case non-conservative forces are acting on the object, the mechanical energy is no longer constant. An example of non-conservative force is the force of friction: when the force of friction is acting on a car in motion, the car is slowed down by the effect of the force, losing some of its kinetic energy, K. If the car is travelling on a flat road, then its potential energy U does not change: this means that the mechanical energy of the car, E, is decreasing, so it is no longer conserved.

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4 0
3 years ago
In what way are gravitational and electrical forces similar?
Nadusha1986 [10]

Answer:

D. Both occur between objects independently whether they are in contact  or not.

Explanation:

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where G is the gravitational constant, m1 and m2 are the two masses, and r is the distance between the two masses.

- The electrical force is a force that is exerted between two (or more) objects having electrical charge. It can be either attractive or repulsive, depending on the sign of the two charges, and its magnitude is given by

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D. Both occur between objects independently whether they are in contact  or not.

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B

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6 0
2 years ago
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