Newton’s Laws Test Question
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one object has twice as much mass as another object. the first object also has twice as much...
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inertia
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how does acceleration of an object change in relation to its mass? it is...
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inversely proportional
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a girl pulls on a 10 kg wagon with a constant force of 20 N. what is the wagon's acceleration?
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2 m/s/s
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a bug splatters against the windshield of a moving car. compared to the force of the car on the bug, the force of the bug on the car is...
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the same
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whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.
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always true
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if you pull horizontally on a desk with a force of 150 N and the desk doesn't move, the friction force must be 150 N. now if you pull with 250 N so the desk slides at constant velocity, the friction force is...
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250 N
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you and a friend are jumping on a trampoline. why does earth, which is rapidly orbiting around the sun, not move under your feet when you jump?
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Newton's first law holds that your body moves along with Earth because it is not compelled to change its motion by an unbalanced force
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the force required to maintain an object at a constant speed in free space is equal to...
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zero
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two people pull on a rope in a tug of war. each pulls with 400 N of force. what is the tension in the rope?
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400 N
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a person is attracted towards the center of Earth by a 440 N gravitational force. the force with which Earth is attracted toward the person is...
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440 N
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a student hits a nail with a hammer. during the collision, there is a force...
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on the nail and also on the hammer
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a person throws a rock downward, and air resistance is negligible. compared to a rock that is dropped, the acceleration of the rock after it is thrown is...
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the same
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Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?
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to nearly its original height
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a tennis ball and a solid steel ball with the same diameter are dropped at the same time. which ball has the greater force acting on it?
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the steel ball
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a karate chop delivers a blow of 2300 N to a board that breaks. the force that acts on the hand during this...
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is less than 2300 N
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suppose the force of friction on a sliding object is 25 N. the force needed to maintain a constant velocity is...
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25 N
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the mass of a lamb that weighs 110 N is about...
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11 kg
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the law of inertia applies to...
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both moving and nonmoving objects
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an archer shoots an arrow. consider the action force to be the bowstring against the arrow. the reaction to this force is the...
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arrow's push against the bowstring
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a book weighs 4 N. when held at rest in your hands, the net force on the book is...
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0 N
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if a horse pulls on a wagon at rest, the wagon pulls back equally on the horse. can the wagon be set into motion?
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yes, because there is a net force acting on the wagon
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a jet has a mass of 40,000 kg. the thrust for each of four engines is 20,000 N. what is the jet's acceleration when taking off?
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2 m/s/s
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a tow truck exerts a force of 2000 N on a car, accelerating at 1 m/s/s. what is the mas of the car?
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2000 kg
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how much does a 3.0 kg bag of bolts weigh?
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29.4 N
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the law of inertia states that an object...
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will continue moving in a straight line unless an outside force acts on it, will continue moving at same velocity unless an outside force acts on it, at rest will remain at rest unless acted on by outside force
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the acceleration produced by a net force on an object is...
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inversely proportional to the mass of the object, in the same direction as the net force, directly proportional to the magnitude of the net force
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a sports car has a mass of 1500 kg and accelerates at 5 m/s/s. what is the magnitude of the force acting on the sports car?
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7500 N
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a sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. the reason this can be done is that...
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the milk carton has inertia
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if you exert a force of 12,000 N on a 3000 kg car and a 6000 kg truck that are both originally at rest, what will be the resulting accelerations of the objects?
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the car will accelerate 4 m/s/s and truck will accelerate 2 m/s/s
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a 20 N falling object encounters 4 N of air resistance. the magnitude of the net force on the object is...
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20 N
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if the force acting on a cart doubles, what happens to the cart's acceleration?
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it doubles
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after the cannonball is fired into frictionless space, the amount of force needed to keep it going equals...
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zero, since no force is necessary to keep it moving
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a push on a 1 kg brick accelerates the brick. neglecting friction, to equally accelerate a 10 kg brick, one would have to push...
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with 10 times as much force
