Newton's Laws Review 1. The unbalanced force required to accelerate a 2.0 kg mass at 4.0 m/s^2 is         a) 6.0 N         b) 2.0 N         c) 8.0 N         d) 16 N 2. A force of 10. N applied to a given mass accelerates it at 1.0 m/s^2. The same force applied to a mass one-half as great would produce an acceleration of         a) 1.0 m/s^2   b) 2.0 m/s^2      c) 0.50 m/s^2     d) 4.0 m/s^2 3. A certain net force causes a 10. kg mass to accelerate at 20. m/s^2. The same force will cause a 5.0 kg mass to accelerate at         a) 9.8 m/s^2   b) 10. m/s^2     c) 25 m/s^2     d) 40. m/s^2 4. A 30 kg child exerts a force of 100 N on a 50 kg object. The force the object exerts on the child is         a) 0.0 N         b) 100 N         c) 980 N         d) 1500 N 5. If the mass of an object is decreased, its inertia         a) decreases         b) increases         c) remains the same 6. If the net force applied in the direction of motion to a certain object on a horizontal frictionless surface is doubled, the acceleration of the object is         a) halved         b) doubled         c) unchanged         d) quadrupled 7. A car whose mass is 2000 kg is accelerated uniformly from rest to a speed of 15 m/s in 10. s on a level highway. The net force accelerating the car is         a) 2000 N         b) 3000 N         c) 20,000 N         d) 30,000 N 8. If the sum of all the forces acting on a car is zero, the car must be         a) at rest b) may be at rest b) must be moving at a constant speed c) must be accelerating 9. Which of the following is equal to one Newton ?         a) kg•m/s         b) kg•m         c) kg•m/s^2         d) kg/m•s^2 10. If the magnitude of the gravitational force of Earth on the Moon is F, the magnitude of the gravitational force of the Moon on Earth is         a) smaller than F           b) larger than F          c) equal to F