Consider the object subject to the two forces of equal magnitude in the figure below. Choose the correct statement with regard to this situation.

a) The object is in torque equilibrium but not force equilibrium.
b) The object is in neither force equilibrium nor torque equilibrium.
C) The object is in force equilibrium but not torque equilibrium.
d) The object is in both force equilibrium and torque equilibrium.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

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?

What is friction? how does it affect the motion of an object?