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Explain why it is easier to pull a ...

Explain why
it is easier to pull a lawn mover than to push it

Text Solution

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While pulling a lawn mover , force is applied upwards along the handle . The vertical component of this force is upwards and reduces the effective weight of the mover, Fig (a) . While pushing a lawn mover , force is applied downwards along the handle . The vertical component of this force is downwards and increases the effective weight of the mover , Fig (b) . As the effective weight is lesser in case of pulling than in case of pushing , there-fore, "pulling is easier than pushing ".
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Explain why (a) a horse cannot pull a cart and run in empty space , (b) passengers are thrown forward from their seats when a speeding bus stops suddenly , (c ) it is easier to pull a lawn power than to push it . (d) a cricketer moves his hands backwards while holding a catch .

Explain why (a) a horse cannot pull a cart and run in empty space, (b) passengers are thrown forward from their seats when a speeding bus stops suddenly, (c) it is easier to pull a lawn mower than to push it, (d) a cricketer moves his hands backwards while holding a catch.

Knowledge Check

  • (A) : It is easier to pull a lawn roller than to push on the same horizontal rough surface (R ) : Pulling body decreases normal reaction

    A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
    B
    Both (A) and (R) are true and (R) is not the
    C
    (A) is true but ( R) is false
    D
    Both (A) and (R ) are false

  • Consider the following A and B and identify the correct choice in the given answers . (A ) For a body resting on a rough horizontal table , it is easier to pull at angle that push at the same angle th cause motion (B) A body sliding down a rough inclined plane of inclination equal to angle of friction hac nonzero acceleration

    A
    both A and B are true
    B
    A is true but B is false
    C
    A is false but B is true
    D
    both A and B are false

  • Consider the following A and B, and identify the correct choice in the given answers. (A) For a body resting on a rough horizontal table, it is easier to pull at angle that push at the same angle to cause motion (B) A body sliding down a rough inclined plane of inclination equal to angle of friction has nonzero acceleration

    A
    Both A and B are true
    B
    A is true but B is false
    C
    A is false but B is true
    D
    both A and B are false

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