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lisabon 2012 [21]
3 years ago
9

The energy that's given to the body by food is A. measured in units called calories. B. best obtained by eating high protein. C.

a nutrient that's essential for growth and development. D. excreted by the body if not used'
Physics
1 answer:
mel-nik [20]3 years ago
4 0

Answer:

Calories, however you might want to back up my answer. I havent studied this topic in a while.

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g We saw in class that in a pendulum the string does no work. We also saw that the normal force does no work on an object slidin
Ymorist [56]

Answer:

From question (a) and (b) the pendulum motion is perpendicular to the force so the normal force will do no work and the tension in the string of the pendulum will not work

       i.e Normal \ Force(N)  = mg cos \theta

And \theta = 90 so

           N = 0

c

An example will be a where a stone is attached to the end of a string and is made to move in a circular motion while keeping the other end of the string in a fixed position        

d

A dog walking along a surface which has friction, here the frictional force would acting in the direction of the motion and this would do positive work  

Explanation:

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1. B- it can cause cirrhosis
2. C- intoxication
3. A- admit to having a problem with alcohol
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5. A- depressant
6. true
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You climb to the top of a ladder. You drop a a ball from height H, it reaches the ground with speed V if there is no air resista
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Answer:

heymelissa its amanda i hate ms spearman

Explanation:

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3 years ago
A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.9 s. What is the coefficient of kinetic
Ilia_Sergeevich [38]

Answer:

\mu_k=0.27

Explanation:

According to the free body diagram, in this case, we have:

\sum F_x:-F_k=ma\\\sum F_y:N=mg

Recall that the force of friction is given by:

F_k=\mu_k N

Replacing and solving for the coefficient of kinetic friction:

-\mu_kN=ma\\-\mu_k(mg)=ma\\\mu_k=-\frac{a}{g}

We have an uniformly accelerated motion. Thus, the acceleration is defined as:

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Finally, we calculate \mu_k:

\mu_k=-\frac{-2.63\frac{m}{s^2}}{9.8\frac{m}{s^2}}\\\mu_k=0.27

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3 years ago
Density is a property of matter that relates
tiny-mole [99]
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