A 4.5 kg block is pulled across a horizontal surface that has a coefficient of kinetic friction of 0.40. a. What is the force of friction exerted by the surface on the block? b. If the block is pulled by a 25 N force, what is the net force acting on the block? c. What is the acceleration of the block? Be sure to draw a free-body diagram.

What is the scientific definition of energy that relates to work

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

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these