which object will require the greatest amount of force to change its motion? a: a 63kg object moving 27 m/s b: a 75kg object moving 22 m/s c: a 72kg object moving 25 m/s d: a 55kg object moving 32 m/s

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?