annie and her very tall boyfriend andy go jogging togrther.whenever they are running they notice they have more or less the same speed.but whenever they are walking they notice andy is always faqster.clarify this unde the guiding light of physics.

i m not confident still i m trying!

when we r running its the frequency of our steps which determines our speed.if a tall man takes 1 step of distance s in 1sec and a short guy takes 1.5 steps of sm in 1s then their speed is same.but in walking the length of steps is more imp so a taller person walks faster than a short person.

m i right?

I agree with indr12365

..wats wrong in what she said??in case of the boyfriend,the angle @ btw the legs is less for a step of the same distance as compared to annie..and mgsin@ is the force which propels him...so there is less force in forward direction-so he's slower..

n dude sinha0109..when you give a question just type it a little more carefully,will you?...i got confused when you said 'andy'-i thought it might be the boyfriend!!!

Even in the hemispheres-joined-together thing there was some confusion.

Ohk..sorry..

But spidey,even when you jog,the length of your stride makes a difference in speed right?

Though only one foot is on the ground,for the same force applied on the ground,a taller person will cover more distance.

 Walking takes you from point A to point B in a straight line like a bowling ball, while running is more like a bouncing ball. “When you walk, you keep your legs mostly straight, and your center of gravity rides along fairly smoothly on top of your legs,” Burfoot writes. “In running, we actually jump from one foot to the other. Each jump raises our center of gravity when we take off, and lowers it when we land, since we bend the knee to absorb the shock. This continual rise and fall of our weight requires a tremendous amount of Newtonian force (fighting gravity) on both takeoff and landing.”

source NEt