Q 2-4 In聽order聽to聽pull聽a聽sled聽ac... [FREE SOLUTION]

Chapter 2: Q 2-4 (page 81)

$I n o r d e r t o p u l l a s l e d a c r o s s a l e v e l f i e l d a t a c o n s \tan t v e l o c i t y y o u h a v e t o e x e r t a c o n s \tan t f o r c e . D o e s n 鈥� t t h i s v i o l a t e N e w t o n 鈥� s f i r s t a n d s e c o n d l a w s o f m o t i o n, w h i c h i m p l y t h a t n o f o r c e i s r e q u i r e d t o m a i n t a i n a c o n s \tan t v e l o c i t y ? E x p l a i n t h i s s e e m i n g c o n t r a d i c t i o n .$

Short Answer

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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.

$T h e f i r s t l a w s t a t e s t h a t a n o b j e c t m o v e s w i t h c o n s \tan t v e l o c i t y u n l e s s r e s i s t e d b y a n e x t e r n a l f o r c e . T h e s e c o n d l a w s t a t e s t h a t t h e r a t e o f t h e c h a n g e o f m o m e n t u m i s d i r e c t l y p r o p o r t i o n a l t o t h e a p p l i e d f o r c e a n d t h e d i r e c t i o n o f t h e f o r c e . F r i c t i o n i s t h e r e s i s \tan c e p r o v i d e d b y o n e s u r f a c e t o a n o t h e r s u r f a c e d u r i n g t h e m o v e m e n t o f t h e s u r f a c e .$

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

$I n t h i s q u e s t i o n, f r i c t i o n i s o n e o f t h e l e a d i n g f o r c e s a c t i n g o n t h e s l e d w h i l e p u l l i n g i t . H o w e v e r, f r i c t i o n a c t s i n t h e o p p o s i t e d i r e c t i o n o f t h e o b j e c t 鈥� s m o t i o n w h i c h s i g n i f i e s f r i c t i o n c a n c e l s a n d c o u n t e r a c t s t h e f o r c e s t h a t c a u s e m o t i o n . H e n c e, i t e v e n t u a l l y l e a d s t o s m a l l e r a c c e l e r a t i o n a n d r e d u c e d n e t f o r c e . H e n c e, t h a t i s o n e o f t h e m a i n r e a s o n s f o r a p p l y i n g a c o n s \tan t f o r c e .$

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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

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Inordertopullasledacrossalevelfieldataconstantvelocityyouhavetoexertaconstantforce.Doesn鈥�tthisviolateNewton鈥�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

Physical Quantities And Units

Fundamentals of Physics

Engineering Physics

Nuclear Physics

Magnetism and Electromagnetic Induction

Mechanics and Materials

Study anywhere. Anytime. Across all devices.