A) The large whee on Wyns wheelchair has a diameter of 60cm.
Wyn Pushes The wheel round exactly once
alculate how far wyn has moved??
please can anyone help??
and question B please it would be a great help...
B) The large wheel on Jays wheelchair has a diameter of 52cm
Jay Moves her wheelchair forward 950cm
calculate how many times the large wheel goes around.
2007-03-05 04:37:00 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
In the part A you simply need to calculate the circumference of the wheel.
C = pi x diameter
C = pi x 60 cm (pi = 3,141592654...)
C = 188,5 cm
In the part B you need to find out how many circumferences "fit into" 950 cm.
The circumference of the large wheel on Jay's wheelchair is
C = pi x 52 cm = 163,36 cm
As 950 divided by 163,36 equals 5,81, this means that the large wheel went around 5,81 times to move 950cm forward.
Hope this helped.
2007-03-05 04:40:41 · answer #1 · answered by M 6 · 2⤊ 0⤋
Circumference is PI * diameter.
If you think about it, when you roll a wheel, the wheel always has to be touching the ground. When the wheel rolls, there's a one to one correspondence between each point on the ground and each point on the wheel. To roll the wheel through one complete revolution, the wheel has to move the same distance as the circumference.
So, the answer to A is that the wheel has moved PI * 60, or about 188.5 cm.
For B, divide 950 cm by (PI * 52 cm) to get:
950/(PI * 52) = 5.8 revolutions.
2007-03-05 12:44:23 · answer #2 · answered by Bob G 6 · 0⤊ 0⤋
a) The wheelchair has moved forward by the circumference of the wheel which is Pi * Diameter = 3.141592654 * 60 = 188.50cm
b) The circumference of the wheel again is Pi x diameter so this equals 3.141592654 * 52 = 163.263818
Therefore it has turned 950 divided by 163.263818 = 5.82 times
Hope that helped
2007-03-05 12:39:43 · answer #3 · answered by agius1520 6 · 0⤊ 1⤋
One revolution of the wheel moves the wheelchair the circumference of the wheel. Circumference = Pi * Diameter
Hence:
A. Distance = 60*Pi
B. Revolutions = 950/(52*Pi)
I shall leave you to evaluate.
2007-03-05 12:43:40 · answer #4 · answered by Clive 6 · 0⤊ 0⤋
For part A you need to find the circumfrence of the wheel to determine the distance traveled. For part B its the same deal. Calculate the circumfrence of the 52cm wheel then divide 950cm into that for the number of revolutions.
2007-03-05 12:46:57 · answer #5 · answered by Sane 6 · 0⤊ 0⤋
the circumference of the wheel is 60pi this represents how far the wheel would move in one revolution.
B. the circumference is 52pi = 163.28 cm this is the movement for one revolution.
950/163.28 = 5.81 revolutions
2007-03-05 13:58:07 · answer #6 · answered by bignose68 4 · 0⤊ 0⤋
circumference = Pi * Diameter
substitute in the known values for either circumference
for b,
distance moved = x times the circumference, so would be
circumference = x(pi*distance) or 950 = x(52pi)
2007-03-05 12:42:25 · answer #7 · answered by strayinma 4 · 0⤊ 1⤋
A) pi*60 cm
B) 950/(pi*52)
2007-03-05 12:42:03 · answer #8 · answered by ag_iitkgp 7 · 0⤊ 1⤋
Do the following and you will be fine
Diameter multiplied by pi will give you the circumference.
The rest is easy......
2007-03-05 13:24:58 · answer #9 · answered by andromeda 1 · 0⤊ 0⤋
You will never learn if you keep asking other people to do your homework for you.
2007-03-05 12:45:45 · answer #10 · answered by Anonymous · 0⤊ 0⤋