For the exercises in this chapter (and subsequent chapters), use the more accurate value of g = 9.8 m/s for the acceleration due to gravity. El. A single force of 42 N acts upon a 6-kg block. What is the magnitude of the acceleration of the block? E2. A heavy ball with a mass of 4.5 kg is observed to accelerate at a rate of 7.0 m/s. What is the size of the net force acting upon this ball? E3. A net force of 32 N acting upon a wooden block produces an acceleration of 4.0 m/s for the block. What is the mass of the block? E4. A 4.0-kg block being pulled across a table by a horizontal force of 70 N also experiences a frictional force of 15 N What is the acceleration of the block? E5. A pulled tablecloth exerts a frictional force of 3.6 N on a plate with a mass of 0.4 kg. What is the acceleration of the plate