In the figure below, m; = 10.5 kg and my - 4.5 kg. The coefficient of static friction between m, and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30. (a) If the system is released from rest, what will its acceleration be?
(b) If the system is set in motion with my moving downward, what will be the acceleration of the system?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car