A Student plucks a string on a guitar to play a note. How could the student make the sound softer? A. decrease the frequency by making the string longer.

B. decrease the amplitude by plucking with less force.

C. increase the amplitude by plucking with greater force.

D. increase the frequency by making the string shorter.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

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?

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. the area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?