A box moved down a factory conveyor belt at a constant velocity for 0.2minutes. During that time, a factory worker walked past the box at 58 meters per minute, and the box moved 4meters. What was the box's velocity?

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

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

What is a subatomic particle with a negative charge and very little mass?