Why does a moving car tend to nose down when the brakes are applied? does it matter whether it has front or rear wheel drive? when a car executes a turn too quickly, it may rise up on two wheels. why? on which side (inside or outside the turn) will it rise up? why should a cyclist slide back in the seat when making a sudden stop?

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?