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Nothing would stay still. Without friction you cannot stand, let alone walk. The easiest way to think of it is comparing walking on ice and walking on pavement. Ice has a smoother surface than pavement, for good reason; the ice has less friction due to that smooth surface, so you cannot 'grip' the ground with your foot/boot/shoe etc. However the pavement is designed to be bumpy, textured so that you can find purchase when walking, even if it is wet.
walking
walking on the floor
conduction
For example, it keeps you from slipping when you walk.
Walking on hot pavement would definitely be uncomfortable!
1.don't walk on it! 2.don't walk on it!
no
That is correct, walking is a form of moderate activity.
As compared to walking on unpaved dirt, walking on rigid pavement is easier, and less dirt sticks to your shoes, especially when it has been raining and the dirt road gets muddy.
A popping sensation in your thighs when walking could be your muscles stretching. Some leg exercises should help relieve this pain.
You don't spend money when you walk so walking is an inexpensive activity.
The word 'pavement' is a noun, a word for the hard, smooth surface used for walking or driving motor vehicles; a word for the material used to form that surface; a word for a sidewalk; a word for a thing.
walking on the desserts
Walking the dog
transportation
The higher level of an activity means the higher level pulse rate. For example running will produce a higher pulse rate than walking would.