A car starts from rest - after moving some distance d- it gains speed V thendA- Work done by friction on the car is negative-B- Work done by normal force between tyres - road is positive-C- Work done by engine force on the car is negativeD- Work done by normal force between tyres - road is zero-

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Standard XII

Physics

Vector Component

A car starts ...

Question

A car starts from rest & after moving some distance $d$ , it gains speed $v$ then

Work done by friction on the car is negative.

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Work done by engine force on the car is negative

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Work done by normal force (between tyres & road) is zero.

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Work done by normal force (between tyres & road) is positive.

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Solution

The correct option is C Work done by normal force (between tyres & road) is zero.
$W =$ $\to F . \to d$ or energy transferred

$W_{b y N} = N . d$
= 0
Since there is no displacement in the direction of normal.

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A car starts from rest & after moving some distance d, it gains speed v then

The correct option is C Work done by normal force (between tyres & road) is zero.W=→F.→d or energy transferred WbyN=N.d = 0 Since there is no displacement in the direction of normal.

A car starts from rest & after moving some distance $d$ , it gains speed $v$ then

The correct option is C Work done by normal force (between tyres & road) is zero.
$W =$ $\to F . \to d$ or energy transferred

$W_{b y N} = N . d$
= 0
Since there is no displacement in the direction of normal.