Question

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A body travels 200cm in the first 2sec and 220 in the next 5 sec . calculate the velocity at the end of the seventh second from the start.

★explain in brief★
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Answer 1

HEY.......☺

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LET'S SOLVE IT STEP BY STEP.....

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FIRSTLY ,

TIME = 2 SEC

DISTANCE = 200 CM

SO IT SHOULD BE CONVERTED INTO METER....

200CM./ 100

2M

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SPEED = DISTANCE / TIME

SPEED = 2 / 2

SPEED = 1 M/S

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SECONDLY ,

DISTANCE = 220 CM

MEANS

220 / 100 = 2.2M

TIME = 5 S

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THUS,

SPEED = DISTANCE / TIME

SPEED = 2.2 / 5

SPEED = 0.44M/S

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FOR GETTING THE AVERAGE SPEED ( VELOCITY )

ADD BOTH THE SPEEDS / 2

1 + 0.44 /2

1.44 / 2

0.72 M/S.....

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HOPE IT WILL HELP U MATE ☺

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