2006-06-17 23:48:10 · 8 answers · asked by yogesh k 1 in Science & Mathematics ➔ Engineering
during motion the wheel turns into a gyroscope. A body when rotating about an axis certain energy is associated with it. When you u try to change this axis of rotation energy is required for it. So when a bike is in motion the wheels act as gyroscopes n the tru to resist any change in this orientation(vertical). So it does not fall.
This fact can further b established as when u make a turn the bike inclines along the turn. this is bcoz while turning we are changing the axis of rotation of wheels. the energy required for this purpose is drawn by bending the bike
2006-06-18 00:30:24 · answer #1 · answered by Sean 3 · 5⤊ 1⤋
The short answer is that a body in motion tends to stay in motion while a body at rest tends to stay at rest. When you ride a bike it has a certain amount of momentum (1/2m VxV). That represents a certain amount of energy that tends to keep the bike going in the original direction (straight ahead) until the energy is lost. You can change the direction by steering and leaning slightly into the turn because the turn can be made without losing much energy.
A stationary bike has no momentum or energy to be lost. It is a neat trick to balance it by shifting your weight (center of gravity) if it leans in the wrong direction.
2006-06-18 12:40:23 · answer #2 · answered by Kes 7 · 0⤊ 0⤋
When a bike is stationary, it rests on a very small area of contact. A very small disturbance can shift its CG out of the support. The wt of the bike then provides an overturning torque on the bike, leading to its ultimate downfall!
The case of a moving bike is different. Here too the wt acts as an overturning torque. the basic property of an applied torque i sto change the angular momentum of the bike. For a moving bike there remains the option of changing the direction of this angular momentum vector. This compensates the torque without overturning the system. That ia why when we drive a bike or cycle, we frequently make small adjustments of the direction to counter the changing moods of the angular momentum vector!
2006-06-17 23:55:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Gyroscopic effect...see Wikipedia
2006-06-18 17:55:07 · answer #4 · answered by bough10 1 · 0⤊ 0⤋
Mine's perfectly stable when standing. Have you thought of leaning yours up against a wall? It works with mine.
2006-06-17 23:52:28 · answer #5 · answered by Anonymous · 0⤊ 0⤋
motion keeps it stable
2006-06-17 23:51:52 · answer #6 · answered by cschultz28 3 · 0⤊ 0⤋
probably bc u're short.
2006-06-17 23:51:48 · answer #7 · answered by Anonymous · 0⤊ 0⤋
so u dont fall
2006-06-17 23:51:51 · answer #8 · answered by the red machine 1 · 0⤊ 0⤋