Question

1. Newton's first law of motion states than an object's motion will not change unless a. the net force acting on it is greater than zero. b. a force continues to be applied to the object. c. its inertia is stronger than the applied force. d. the object has no inertia. 2. Overcoming an object's inertia always requires a(n) a. large mass. b. massive force. c. unbalanced force. d. two of the above 3. It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater a. size. b. inertia. c. volume. d. velocity. 4. Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for a. inertia. b. friction. c. an unbalanced force. d. two of the above 5. An object's velocity will not change unless it is acted on by a(n) a. net force. b. strong force. c. unbalanced force. d. opposite but equal force. 6. The direction of a moving object will not change if the net force acting on it is a. greater than zero. b. less than zero. c. zero. d. two of the above

          1. Newton's first law of motion states than an object's motion will not change unless
a. the net force acting on it is greater than zero.
b. a force continues to be applied to the object.
c. its inertia is stronger than the applied force.
d. the object has no inertia.
2. Overcoming an object's inertia always requires a(n)
a. large mass.
b. massive force.
c. unbalanced force.
d. two of the above
3. It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has
greater
a. size.
b. inertia.
c. volume.
d. velocity.
4. Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for
a. inertia.
b. friction.
c. an unbalanced force.
d. two of the above
5. An object's velocity will not change unless it is acted on by a(n)
a. net force.
b. strong force.
c. unbalanced force.
d. opposite but equal force.
6. The direction of a moving object will not change if the net force acting on it is
a. greater than zero.
b. less than zero.
c. zero.
d. two of the above

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1. Newton's first law of motion states than an object's motion will not change unless
a. the net force acting on it is greater than zero.
b. a force continues to be applied to the object.
c. its inertia is stronger than the applied force.
d. the object has no inertia.
2. Overcoming an object's inertia always requires a(n)
a. large mass.
b. massive force.
c. unbalanced force.
d. two of the above
3. It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has
greater
a. size.
b. inertia.
c. volume.
d. velocity.
4. Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for
a. inertia.
b. friction.
c. an unbalanced force.
d. two of the above
5. An object's velocity will not change unless it is acted on by a(n)
a. net force.
b. strong force.
c. unbalanced force.
d. opposite but equal force.
6. The direction of a moving object will not change if the net force acting on it is
a. greater than zero.
b. less than zero.
c. zero.
d. two of the above

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University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Ryan Mcnamara

05/12/2022

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Step 1: Newton's first law states that an object's motion will not change unless the net force acting on it is greater than zero. Show more…

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Newton's first law of motion states than an object's motion will not change unless the net force acting on it is greater than zero. Force continues to be applied to the object if its inertia is stronger than the applied force. The object has inertia. Overcoming an object's inertia always requires a massive force or an unbalanced force. It is more difficult to start a 50-kg box sliding across the floor than a 5-kg box because the 50-kg box has greater inertia. Once an object starts moving along a clear path, it would keep moving at the same velocity if it were not for inertia and friction, or an unbalanced force. An object's velocity will not change unless it is acted on by a net force or an unbalanced force. The direction of a moving object will not change if the net force acting on it is greater than zero.

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Transcript

00:01 Okay, so we've got a series of questions on newton's first law.

00:05 Newton's first law states that an object in motion will stay in motion unless acted upon by a net external force.

00:11 A net external force is a net force greater than zero.

00:15 So for option number one, we're looking at choice a, where the net force would be greater than zero.

00:23 Okay, question two is about inertia.

00:26 Inertia is really the object's mass.

00:29 The more mass an object has, the more inertia it has.

00:32 And so the more difficult it will be to accelerate.

00:35 So in order to overcome inertia, or in order to accelerate an object, you would need an unbalanced force.

00:43 In other words, the net force would not be zero.

00:47 Unbalanced force.

00:50 So these two questions one and two are kind of asking the same thing, but in different ways.

00:55 Okay, looking at question number three here, you're comparing a 50 -kilogram box to a five -kilogram box, and the 50 kilogram box as a greater mass, also a greater inertia.

01:13 Because again, greater inertia is really just another way of saying a greater mass.

01:19 Okay, so this would be choice b.

01:23 Number four here, you've got an object that's moving in a straight line with some constant velocity.

01:30 In order to keep it moving at the same velocity, what needs to be true.

01:35 So inertia is not a four.

01:39 And it's going to allow the object to keep its motion.

01:43 Friction is an example of an unbalanced force.

01:47 So that would slow the object down...

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