A 1.5kw vacuum cleaner is used for half an hour. Calculate its energy usage.
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The magnitude of the friction on the cart is 28,56 N
To measure the deceleration of a car, without the value of the time of the movement, the <u>Torricelli equation</u> is used, which consists of:
Where is final velocity, is initial velocity, is acceleration, and is displacement.
Now, substitute the values in the formula:
Finally, the value of the acceleration found is multiplied by the mass of the object, thus measuring the friction force:
Learn more about friction force at: brainly.com/question/13707283
