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victus00 [196]
3 years ago
12

Why is the weight of the ruler not include in the calculation of moment?​

Physics
1 answer:
Feliz [49]3 years ago
3 0

Answer:

Since the distance between the pivot and its weight is zero, the moment of its weight about the pivot (= weight × 0) is zero. Hence, the weight of the ruler can be ignored.

Hope this helps:)

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A car traveling at 30 m/s drives off a cliff that is 50 meters high? How far away does it land?
Semenov [28]

Answer:

The maximum range R_{max}= 132. 72 m

Explanation:

Given,

The initial velocity of the car, u = 30 m/s

The height of the cliff, h = 50 m

Let the car drives off the cliff with a horizontal velocity of 30 m/s.

The formula for a projectile that is projected from a height h from the ground is given by the relation

                                R_{max}= \frac{u}{g}\sqrt{u^{2} + 2gh }  m

Where,

                          g - acceleration due to gravity

Substituting the values in the above equation

                   R_{max}= \frac{30}{9.8}\sqrt{30^{2} + 2X9.8X50 }  

                                          = 132.72  m

Hence, the car lands at a distance, R_{max}= 132. 72 m            

3 0
3 years ago
What will happen to plant height if the amount of available light is reduced due to global dimming?
SpyIntel [72]
The plants would wilt and decrease in height due to the lack of sunlight. I hope I helped!
7 0
3 years ago
A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what woul
topjm [15]

Answer:

increase in temperature of water is 10° C

Explanation:

Given data

pizza = 500 kcal = 500000 calories

cold water = 50 L

to find out

increase in temperature of water

solution

we know heat formula that is

heat = m × specific heat × Δt

here m is mass = 50000 gram and Δt is change in temperature

and specific heat = 1 cal / gram C

so put here all value and find Δt

500000 = 50000 × 1  × Δt

Δt = 10° C

so increase in temperature of water is 10° C

4 0
3 years ago
Read 2 more answers
Is water a mixture or substance​
elena55 [62]

Hey!

--------------------------------------------------

Answer:

Substance

--------------------------------------------------

Explanation:

Water is a substance created with oxygen and hydrogen.

A mixture is when more than one substance are mixed together.

--------------------------------------------------

Hope This Helped! Good Luck!

7 0
3 years ago
Read 2 more answers
a circuit has a total resistance of 5 ohms and a current of 0.3 amperes. What voltage must the battery supply?
iren [92.7K]

Answer:

1.5volts

Explanation:

V=IR =0.3×5=1.5volts

5 0
3 years ago
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