An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force? a. The net force is positive.
b. The net force is zero.
c. The positive force is greater than the negative force.
d. The negative force is greater than the positive force.

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?