Chapter 2: Q 875865 2 4 (page 81)

$I n o r d e r t o p u l l a s l e d a c r o s s a l e v e l f i e l d a t a c o n s \tan t v e l o c i t y y o u h a v e t o e x e r t a c o n s \tan t f o r c e . D o e s n ’ t t h i s v i o l a t e N e w t o n ’ s f i r s t a n d s e c o n d l a w s o f m o t i o n, w h i c h i m p l y t h a t n o f o r c e i s r e q u i r e d t o m a i n t a i n a c o n s \tan t v e l o c i t y ? E x p l a i n t h i s s e e m i n g c o n t r a d i c t i o n$ .

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$T h u s, t h i s v i o l a t e s t h e f i r s t a n d t h e s e c o n d l a w s o f t h e m o t i o n$ .

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Significance of Newton’s first and second laws and friction

The first law states that an object moves with constant velocity unless resisted by an external force.

The second law states that the rate of the change of momentum is directly proportional to the applied force and the direction of the force.

Friction is the resistance provided by one surface to another surface during the movement of the surface.

Determination of the violation of the Newton’s first and second law

$I n t h i s q u e s t i o n, f r i c t i o n i s o n e o f t h e l e a d i n g f o r c e s a c t i n g o n t h e s l e d w h i l e p u l l i n g i t . H o w e v e r, f r i c t i o n a c t s i n t h e o p p o s i t e d i r e c t i o n o f t h e o b j e c t ’ s m o t i o n w h i c h s i g n i f i e s f r i c t i o n c a n c e l s a n d c o u n t e r a c t s t h e f o r c e s t h a t c a u s e m o t i o n . H e n c e, i t e v e n t u a l l y l e a d s t o s m a l l e r a c c e l e r a t i o n a n d r e d u c e d n e t f o r c e . H e n c e, t h a t i s o n e o f t h e m a i n r e a s o n s f o r a p p l y i n g a c o n s \tan t f o r c e .$

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Significance of Newton’s first and second laws and friction

Determination of the violation of the Newton’s first and second law

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Inordertopullasledacrossalevelfieldataconstantvelocityyouhavetoexertaconstantforce.Doesn’tthisviolateNewton’sfirstandsecondlawsofmotion,whichimplythatnoforceisrequiredtomaintainaconstantvelocity?Explainthisseemingcontradiction.

Short Answer

Step by step solution

Significance of Newton’s first and second laws and friction

Determination of the violation of the Newton’s first and second law

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Magnetism and Electromagnetic Induction

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Famous Physicists

Study anywhere. Anytime. Across all devices.