In a controlled experiment to test Newton’s Second Law, which of the following sets of changes would allow a student to directly observe how force affects acceleration?, Increase both the force and the mass simultaneously., Keep the force constant, while increasing the mass, Keep the mass constant, while increasing the applied force., Decrease the force and keep the mass constant., A truck driver needs to stop quickly. Compared to a small family car, why does it require more force to achieve the same rate of deceleration (slowing down)?, The truck has more mass, so it needs more force to change its motion., The truck is larger, so air resistance slows it down more., The car has a better engine with more power., The truck’s acceleration is greater than the car’s., If the net force acting on an object is halved (cut in half) and its mass is doubled, what happens to the object’s acceleration?, The acceleration stays the same., The acceleration is quadrupled (4x)., The acceleration is reduced to 1/4 of its original value., The acceleration is doubled..

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