Acrate is given a big push, and after it is released, it slides up an inclined plane which makes an angle 0.52 radians with the horizontal. the frictional coefficients between the crate and plane are (\muμs = 0.84, \muμk = 0.48 ). what is the magnitude of the acceleration (in meters/second2) of this crate as it slides up the incline?

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?