3 years ago

Which of these is the best description for a circuit with an open switch?

Physics

1 answer:

Arlecino [84]3 years ago

7 0

B) turned off

Explanation:

A circuit in which the switch is open is one that has been turned off. In such a circuit, the flow of electricity is deliberately cut of.

A switch is an electrical device that is used to open and close the circuit.
When a switch is open, the circuit is turned off and the completion of the circuit is terminated at the point.
When a switch is closed, the circuit is on and completed.
Current will flow from the battery and power the appliances.
Switches are used to regulate and put off devices when they are no more in use.

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How long must a tow truck apply a force of 600 N to increase the speed of a 1,500 kg car at rest to 2 m/s?

slega [8]

The time the truck must apply the given force to increase its speed to given value is 5 s.

The given parameters;

applied force, F = 600 N
mass of the truck, m = 1,500 kg
speed of the truck, v = 2 m/s

The force applied to the truck is determined by Newton's second law of motion; which states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

F = ma

$F = \frac{mv}{t} \\\\t = \frac{mv}{F} \\\\t = \frac{1500 \times 2}{600} \\\\t = 5 \ s$