Una masa de 9.0 kg cuelga en el extremo de una cuerda. Encuentre la tensión en la cuerda si la aceleración de la masa es: a) 3.5 m/s2 hacia arriba, b) 3.5 m/s2 hacia abajo, c) 9.81 m/s2 hacia abajo. Considera la aceleración de la gravedad igual a 9.81 m/s2.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)