Kreyn

11 Questions
17 Answers

0

796

0

+108

Limit of a dot product

Abstracting from a physics problem here...

In short, need to show that a plane (defined by specific indices) is perpendicular to a vector.
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Kreyn May 20, 2018

0

2

3592

1

+108

Centre of mass

A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at 100ms.

(a) How far below the release point is the center of mass of the two stones at t=300? (Neither stone has yet reached read more ..

Kreyn Mar 24, 2017

0

799

0

+108

Centre of mass

A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at 100ms.

(a) How far below the release point is the center of mass of the two stones at t=300? (Neither stone has yet reached read more ..

Kreyn Mar 23, 2017

0

805

0

+108

Centre of mass

A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at 100ms.

(a) How far below the release point is the center of mass of the two stones at t=300? (Neither stone has yet reached read more ..

Kreyn Mar 23, 2017

0

843

0

+108

Centre of mass

A stone is dropped at t = 0. A second stone, with twice the mass of the first, is dropped from the same point at 100ms.

(a) How far below the release point is the center of mass of the two stones at t=300? (Neither stone has yet reached read more ..

Kreyn Mar 22, 2017

0

1274

2

+108

Mechanics 2

I am posting this question again, here is a link to the original question.

http://web2.0calc.com/questions/mechanics_2
read more ..

Kreyn Mar 6, 2017

0

2

2979

4

+108

Mechanics

A steel ball is dropped from a building's roof and passes a window, taking 0.125 s to fall from the top to the bottom of the window, a distance of 1.20m. It then falls to a sidewalk and bounces back past the window, moving from bottom to top in 0.125 read more ..

Kreyn Mar 5, 2017

0

24

10571

2

+108

Area of 3 overlapping circles

Three equal circles with radius r are drawn as shown, each with its centre on the circumference of the other two circles. A, B and C are the centres of the three circles. Prove that an expression for the area of the shaded region is:
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Kreyn Oct 21, 2016

0

1

9811

5

+108

-2cos(x)sin(x) = -sin(2x)

-2cos(x)sin(x) = -sin(2x)

Can someone please explain how?
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Kreyn ●●●●●

Kreyn Aug 26, 2016

0

1032

2

+108

Find the point of intersection.

Find the point of intersection.

and read more ..

Kreyn Jul 24, 2016

+5

830

4

+108

Linear Equation

We have a line that passes through points (2,3) and (5,-1).

Using the formula's:
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Kreyn ●●●●

Kreyn Jul 17, 2016