# How does weight influence static and knetic friction?

we pulled an object using a spring balance {horizontally} what where we measuring with the spring balace? where does mass and weight come in? would my aim be to determine whether weight will have an effect
on static or kinetic friction? i am just confused with this whole thing! what is the point of this expiremnent?

## The Attempt at a Solution

LowlyPion
Homework Helper
would my aim be to determine whether weight will have an effect on static or kinetic friction?
Welcome to PF.

The aim is to determine the force needed to move different weights.

The ratio of the force required divided by the weight is your coefficient of friction. That's what they want you to determine.

Weight will have an effect on friction as the friction force is the friction coefficient * the normal force. Remember static and kinetic coefficiants are different (kinetic coefficient is lower).

If you only pulled 1 block, then the aim is to get you to see that the coefficients are different. If you pulled multiple blocks then the aim was to determine the effect of weight.

tiny-tim
Homework Helper
Welcome to PF!

we pulled an object using a spring balance {horizontally} what where we measuring with the spring balace? where does mass and weight come in? would my aim be to determine whether weight will have an effect
on static or kinetic friction? i am just confused with this whole thing! what is the point of this expiremnent?
Hi musi! Welcome to PF!