They attract if they are oppositely charged and they repel if they have the same charges.
Answer:
a.All of the listed answers are correct.
Explanation:
Newton's law of universal gravitation states two bodies attract each other with a force directly proportional to the square of their masses and inversely proportional to the square of the distance that separates them, and is directed along the line that joins the bodies. This force is known as the force of gravity or gravitational force and is expressed as:
Where:
Therefore, the gravitational interaction between two bodies always manifests as a pair of equal forces in direction and magnitude but in the opposite direction.
Work is being done when Jessica pushes a 25 kilogram cart a distance of 10 meters and Bane carries a 20 kilogram box a distance of 50 meters.
<h3>
What is Work ?</h3>
Work is the product of force and distance in the direction of the force. And the S.I unit of work is Joule
Looking at the given options one by one;
O Jessica pushes a 25 kilogram cart a distance of 10 meters. Work is done by Jessica. The work done = 25 x 10 x 10 = 2500 Joules
O A weightlifter holds a 100 kilogram barbell over his head. The weightlifter does no work.
O Bane carries a 20 kilogram box a distance of 50 meters. Bane does work. The work done = 20 x 10 x 10 = 2000 Joules
O Ali is trying to push a truck away from the parking lot. Since there is no movement, there is no work done.
Therefore, Work is being done when Jessica pushes a 25 kilogram cart a distance of 10 meters and Bane carries a 20 kilogram box a distance of 50 meters.
Learn more about Work here: brainly.com/question/25573309
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Answer:
Mass velocity and radius are all related to centripetal force
Explanation:
By frequency of its rotation and the radius of the circular path along which objects moves
AMA- actual machine advantage
IMA- ideal / theoretical machine advantage
Efficiency = AMA / IMA
=3 / 10
=0.3
