A skateboarder is moving with a position function r(t)=5t+2, with position in meters and time in seconds. Find the displacement from t=3 seconds to t=8seconds.

B) 20 m

A) 25 m

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass