NEWTON”S LAW PRACTICE TEST Consult your Newton’s Laws graphics to help you complete the practice questions below. AFTER you complete the practice test, you can check your results by reviewing the key that will be posted on our website:

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1) An automobile is at rest on a level road. Which of the following is True?

a) No forces act on the car.b) The force due to gravity on the car is zero.c) The normal force is equal to the weight of the car.

2)  The car in the photo will remain at rest until:

a) a force of any magnitude or direction is applied.b) a force greater than the weight is applied in a direction parallel to the road.c) a force greater than the friction force is applied in a direction parallel to the road.

3)   The acceleration of an object is:a) directly proportional to the unbalanced force and mass.b) directly proportional to the unbalanced force and inversely proportional to the mass.c) inversely proportional to the unbalanced force and directly proportional to the mass.

4) The SI unit of force is ___________________ The SI unit of mass is __________________. The SI unit of acceleration is __________________. 5) A newton is equivalent to one:

a) kg m /sb) kg m2/sc) kg m/s2

d) kg m2/s2

6)     Forces cana) Cause acceleration when they are unbalanced. b) be in equilibrium when they are balanced. c) act in pairs. d) All of the above.

For Number 7:

7) The direction of the net force in free body diagram shown is:

a) forwardb) backwardsc) upwardd) downward

8) On Earth, 1.0 kg physics book weighs:a) 1.0 kgb) 9.8 kgc) 1.0 Nd) 9.8 N

9)   How much force is required to give a 2000 kg car an acceleration of 3.0 m/s2 ?

a) 2000 Nb) 58800 Nc) 667 Nd) 6000 N

10) The same force is applied to a 2000 kg car and a 4000 kg truck, both initially at rest. 

a)  The car’s acceleration is twice that of the truck.b) The car and truck have the same momentum.c) The truck travels twice as far as the car.d) Both accelerate the same amount.

11. The net force on the object above is:

a). 7 N left b). 14 N right c). 14 N left d). 0 n

12)     An unhappy individual is trying to slide a 100 kg desk across a wood floor. she applies an 800 N force parallel to the level floor, but the desk does not move. One can conclude that the force of static friction is:

a) more than 800 N.b) more than 980 N.c) exactly 800 N.d) exactly 980 N.

13)  A newton is a valid unit fora) mass.b) weight.c) acceleration.d) velocity.

2 N 2N 1N

14)  A net force of 5000 N gives a certain acceleration to a 2000 kg car. How much net force is required to give the same acceleration to a 4000 kg truck?

a) 4000 Nb) 2000 Nc) 2500 Nd) 10,000 N

15). If the net force on a box is directed to the right. What can you conclude about the acceleration?

a). Acceleration is zero. b). Acceleration is toward the right. c). Acceleration is toward the left. d). Acceleration is increasing.

16) Force causes a car to travel at a constant speed of 25 m/s.

a) The applied force must be equal to the weight of the car.b) The applied force must be greater than the friction on the car.c) The applied force must be greater than the weight of the car.d) The applied force must be equal to the friction on the car.

17)     The force of gravity acting on an object is called a) weight.b) mass.c) acceleration.

18). When an object accelerates, it may a). have balanced forces acting on it. b). move at a constant velocity. c). be speeding up, slowing down or curving.d). altering its mass.

19). Mass is a measure of ___________a). Gravitational acceleration. b). Inertia c). Acceleration d). force

20)  You are sliding two boxes across a frictionless floor by applying force F to box A as shown above. The force that box A exerts on box B is

a) equal to F. b) greater than F. c) less than F.

21) What is the net force on a 6 kg object that is accelerating toward the right at 3 m/s/s?

a). 2 Newtons to the rightb). 0.5 Newtons to the rightc). 18 Newtons to the right d). 9 Newtons to the right

22)

Two cars traveling at different velocities collide, Car A has more mass than car B. Select the statement that is best description of the force interaction between the cars.

a). The force on Car A is the same as the force on Car B. b). The force is greater on the car that is travelling faster. c). The force is is greater on Car B because Car A has more mass. d). The force on car B is less than the force on Car A due their weights.

A B

23) A pair of skateboarders push off one another. Person A has a mass of 54 kg. Person B’s mass is 65 kg. Select the statement about their motion after the push.

a). The skateboarders have the same velocity. b). Person A accelerates more. c). Person B accelerates more. d), Person A and person B have the same acceleration.

24) If an object is not accelerating, what can you conclude about the forces on it?

a). The forces are balanced.b). The forces are unbalanced. c). The forces do not influence acceleration.

25) Two objects of different masses interact. The less massive object will

a) not accelerate. b). will accelerate more. c). will accelerate less.

26. If the net force on an object is tripled, the object’s acceleration will:

a). be reduced by one third. b). triple. c). remain constant. d). decrease by 3.

27. The force diagram for a 1 kg object is shown above. Select the statement below that is true.

a), The object is moving at a constant horizontal velocity.b). The object is in equilibrium in all directions. c), The object accelerating to the right. d). The object is at rest.

28. Inertia is a). an object’s ratio of mass to weight. b), an object’s change in velocity c). an object’s tendency to maintain its current state of motion. d). due to an object’s position within a frame of reference.

29).

The truck shown above is moving to the left when the driver hits the brakes to slow down abruptly. The driver did not strap the box down so it is not attached to the slippery truck bed. According to Newton’s 1st Law predicts that the box will:

a). continue to move to the left due to it’s inertia. b). remain in the same position on the truck bed. c). slide off the back of the truck bed.

30. A 45-kilogram object has less inertia than a). a 15-kilogram object. b). a 30-kilogram object. c). a 45-kilogram object. d). a 60-kilogram object.

31. If an object is at rest or moving at a constant velocity, which of Newton’s laws will describe its motion?

a). The First Law. b). The Second Law c). The Third Law

32. Examine the position time graphs above. Which of the graphs shows the motion of an object that is acted upon by unbalanced forces?

a). A b). B c). C d). none

j33. Based on the force diagram above, you can conclude that the object is:

a) Accelerating. b) Moving at constant velocity c). At rest.d). At rest or moving at constant velocity.

34. The net force on the object above is:

a). 32 N right b). 8 N right c). 8 N left d). 0 N

35. The force diagram above shows an object that is a) Accelerating. b) Moving at constant velocity c). At rest.d). At rest or moving at constant velocity.