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) kgm/s         b) kgm         c)
kgm/s^2         d) kg/ms^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


 

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