Review for: Unit 4 – Newton’s Laws of Motion

#1 Newton’s first law of motion is called the law of ______. Inertia Acceleration Interaction Motion

#2 Newton’s second law of motion is called the law of ___. Inertia Acceleration Interaction Motion

#3 Newton’s third law of motion is called the law of ___. Inertia Acceleration Interaction Motion

#4 An object’s inertia is determined by its ____. Weight Acceleration Force Mass

#5 An object in motion will remain in motion and an object at rest will remain at rest unless ________. An external force acts on it The earth moves It accelerates Chuck Norris decides for it to change its motion

#6 A force causes ______. Motion Acceleration Weight Displacement

#7 In outer space, the net force needed to keep a satellite in uniform motion is _____. Zero Some number bigger than zero Equal to its weight

#8 Neglecting air resistance, once a baseball is thrown horizontally its…. Horizontal motion is uniform Vertical motion is accelerated Neither A nor B Both A and B

#9 In projectile motion, the object’s horizontal motion is uniform because _____. There is no net external force action on the object horizontally The object has inertia Both A and B

#10 In projectile motion, the object’s vertical motion is accelerated because _____. There is a net force acting vertically on the object (the force of gravity) The object has inertia The object seeks to be in its natural state (at rest on the ground)

#11 In projectile motion problems, the variable that both horizontal and vertical have in common is ____. Distance Time Acceleration Force

#12 A big rig truck hits a VW bug with a force of 2200N #12 A big rig truck hits a VW bug with a force of 2200N. The truck decelerates a little because the car exerts a reaction force… Much greater than 2200 N Much less than 2200 N Of exactly 2200 N Of an unknown amount since we don’t know the mass of the car

#13 In space, an astronaut can more forward by using a swimming motion. True False Depends on his mass

#14 When the net force on an object is zero, the object must be at rest. True False

#15 If you jump off the bleachers, you pull up on the earth with a force equal to your weight. True False

#16 A book weighing 53 N lies motionless on the table #16 A book weighing 53 N lies motionless on the table. The net force on the book is… 54 N up 54 N down 0 N

#17 A bowling ball has more inertia than a marble because it takes up more space. True False

#18 According to Newton’s Second Law, as force increases acceleration _______. Decreases Stays the same

#19 According to Newton’s Second Law, as mass increases acceleration _______. Decreases Stays the same

#20 Newton’s 3rd Law always deals with ______ object(s) and _______ force(s). One; one One; two Two; one Two; two

Questions? Comments? Criticisms? Concerns? Complaints?