How Do You Calculate the Percent Change in Momentum for a Lorry?

[spritchs]

% Change in Momentum

1. I do not understand how to do this question as part of my revision. can anyone help? ''Calculate the % change in the momentum of the lorry from loaded to unloaded whilst traveling at a constant velocity of 13.41m/s''



2. Momentum = mass x velocity? Loaded lorry weighs 3100kg unloaded weighs 2300kgs.

 

[spritchs]

would change be 25.8% decrease in momentum from loaded to unloaded?

 

[cristo]

would change be 25.8% decrease in momentum from loaded to unloaded?

Yup, that looks correct to me.

[In future, please show your work, as it is easier for someone to check your work than to do it themselves!]

 

[dobry_den]

change = momentum_full - momentum unloaded = m₁v - m₂v = v(m₁-m₂)

percentage change = (change / momentum_full) * 100%

 

[dobry_den]

yeah, i know, i corrected it right after i'd posted it.

 

[cristo]

yeah, i know, i corrected it right after i'd posted it.

Which is why I deleted my last post