A small first-aid kit is dropped by a rock climber who is descending steadily at 0.9 m/s. (a) After 4.0 s, what is the velocity of the first-aid kit?

(b) After the 4.0 s, how far is the kit below the climber?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?