- #1
msimard8
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In a motorcycle race, one lap of the course is 650m. At the start of the race, Genna sets off 4 seconds after Tom does, but she drives her motorcycle 5m/s faster and finishes the lap 2.5 seconds sooner than he does.
a) Find the speed at which each of them is driving.
b) Find the tim etaken by each of them to cover the distance.
How I started this problem
Let x be Genna's time if she started at the same time
Genna
time =x
distance =650
speed = 650/x
Tom
time = x +2.5
distance =650 m
speed = x +2.5
then i did 650/x - 650/x+2.5 = 5m/s
this generated the wrong answers
here are the correct answers
a)Tom 20m/s Genna 25.0m/s
b) Tom 32.5 s Genna 6s
Help
thanks
a) Find the speed at which each of them is driving.
b) Find the tim etaken by each of them to cover the distance.
How I started this problem
Let x be Genna's time if she started at the same time
Genna
time =x
distance =650
speed = 650/x
Tom
time = x +2.5
distance =650 m
speed = x +2.5
then i did 650/x - 650/x+2.5 = 5m/s
this generated the wrong answers
here are the correct answers
a)Tom 20m/s Genna 25.0m/s
b) Tom 32.5 s Genna 6s
Help
thanks