Question

1. how does mass affect friction and speed? (1 point)

if you increase the mass the friction will increase and the speed will decrease.
if you increase the mass it will increase both the friction and the speed.
the increase of mass will not affect the friction or speed.

Explanation:

Friction formula is \(F = \mu N\), where \(N = mg\) ( \(m\) is mass, \(g\) is acceleration due to gravity). So when \(m\) increases, \(N\) increases and thus \(F\) (friction) increases. According to \(F = ma\) ( \(F\) is net force, \(a\) is acceleration), if friction (a resistive force) increases and assuming other forces constant, net force decreases, so acceleration \(a=\frac{F_{net}}{m}\) (if \(F_{net}\) decreases and \(m\) increases, acceleration becomes more negative or less positive depending on direction, but generally for motion against friction, speed will decrease as acceleration is negative or less positive over time).

Answer:

If you increase the mass the friction will increase and the speed will decrease.