Two teams of nine members each engage in a tug of war. Each of the first team’s members has an average mass of 67 kg and exerts an average force of 1349 N horizontally, on the ground. Each of the second team’s members has an average mass of 71 kg and exerts an average force of 1364 N horizontally, on the ground.(a) What is the acceleration of the two teams?
(b) What is the tension in the section of rope between the teams?

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?