3 years ago

What is true about the force acting on the cars at the end of a roller coaster ride as they slow down right before stopping?

Physics

2 answers:

rjkz [21]3 years ago

4 0

That the gravity dosent Change

Sliva [168]3 years ago

4 0

Answer: ummm

Explanation:

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(1) Differentiate EN with respect to r, and then set the resulting expression equal to zero, since the curve of EN versus r is a

Shtirlitz [24]

Answer: The continuation and the last part of the question is (3) Determine the expression for E0 by substitution of r0 into the above equation for EN. What is the equation that represents the expression for E0?

Explanation:

The detailed steps and appropriate derivation and by differentiation is shown in the attachment.

The knowledge of differential calculus is applied.

5 0

3 years ago

How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C?

Ne4ueva [31]

As we know that in order to melt the copper we need to take the temperature of copper to its melting point

So here heat required to raise the temperature of copper is given as

$Q = ms\Delta T$

We know that

melting temperature of copper = 1085 degree C

Specific heat capacity of copper = 385 J/kg C

now we have

$Q = 3(385)(1085 - 83)$

$Q = 1157310 J$

$Q = 1157.3 kJ$

now in order to melt the copper we know the heat required is

$Q = mL$

here we know that

L = 205 kJ/kg

now from above formula

$Q = 3(205) kJ$

$Q = 615 kJ$

now total heat required will be

$Q = 1157.3 kJ + 615 kJ$

$Q = 1772.3 kJ$

As we know that

$1 Cal = 4.18 kJ$

now we have

$Q = \frac{1772.3}{4.18} = 430 KCal$

6 0

3 years ago

Which describes freefall

Sati [7]

A motion where gravity is the only force acting upon it

6 0

4 years ago

A 1.5 kilogram car is moving at 10 meters per second east. A braking force acts on the car for 5.0 seconds, reducing its velocit

Arada [10]

Answer:

I don't know

Explanation:

8 0

3 years ago

In 1965, a group of students wore black arm bands to school in protest of American policies in Vietnam. Administrators banned th

Ede4ka [16]

Answer:

protected under students first amendment rights

Explanation:

did the studyisland :)

4 0

3 years ago