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4 years ago

A different group of students decided to do this experiment by

Physics

1 answer:

GaryK [48]4 years ago

8 0

Answer:

Using an object of less mass can reduce the energy lost due to friction.

Explanation:

let the mass of the object be M.

acceleration due to gravity be g, coefficient of kinetic friction between object and slider be $\alpha$ , angle between horizntal and slider be ∅ and distance slided by the object be d.

work done by friction of the ramp will be the energy lost by ramp due to friction.

work done = force×displacement

force = $\alpha$ ×M×g×cos∅

displacement= d

therefore work done = $\alpha$ ×M×g×cos∅×d

therefore on decreasing the mass M we can see that work done by friction decreases so the energy lost due to friction also decreases.

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Answer:

D. 0.008 T

Explanation:

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3 years ago

How would a graph of velocity vs. Time would look like, if there was no motion at all? (Draw your graph)

Y_Kistochka [10]

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3 years ago

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3 years ago

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Kristine said that an ice cube gains heat when placed in a warm glass of water. Eric said that a hot cup of tea loses heat to co

Sindrei [870]

Answer:

Kristine is correct

Explanation:

this is because when an ice cube is placed into the warm water, it absorbs the heat from the water in order to melt which lowers the water's temperature.

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4 years ago

The ____ method of assessing intake is time consuming, and the results may not be accurate if subjects modify their eating habit

Gelneren [198K]

Answer:

Food record

Explanation:

A food record method is an assessment, study or act of collecting data related to food.

Although Food record method is time consuming and may not be accurate if subjects modify their eating habits during the time of the study the data collected here are of great importance. Some of the importance are;

(1). It helps in the registration of foods.

(2). The data can be used to describe a population's intake.

(3). The data can be used as a reference parameter in validation studies.

(4). The data can also be used with the Food Frequency Questionnaire.

It other disadvantage apart from its time consuming and error that might occur during the process of conducting the research is that it might be burdensome to the respondents.

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3 years ago