A. Usually friction slows things down. Can you imagine a scenario where it speeds things up? Describe
it

For example, when a person walk

Explanation:

The  force of friction is a resistive force that opposes the motion of objects. It is produced by the contact between two surfaces: since the surfaces are not perfectly smooth, there are "microbumps" that cause a resistive force in the relative motion of the two surface.

This force is evident, for example, when we try to push a crate along the floor: as we push forward, there is a resistive force acting in the opposite direction, and this force is the force of friction.

The force of friction is in the direction opposite to the motion of the object, so in general it tends to slow down the motion of the object over the surface.

However, there is a particular case in which instead friction helps in accelerating the object.

This scenario is when a person walks: in fact, the foot of the person pushes against the floor (backward), and as a result, the floor "pushes" forward with the force of friction, which helps therefore the person to move forward. In fact, the force of friction is the force that allows us to walk forward: without the force of friction, we could not walk (think about how difficult it is to walk over an icy surface: this is because the force of friction on an icy surface is almost zero!)

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.