12. how can pulleys be used together in a system to increase mechanical advantage

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?