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  • JEE Main & Advanced
  • 11th
  • Physics

Q.

A 20 kg block attached to an spring of spring constant 5 N/m is relesed from rest at A. The spring at this instant is having an elongation of 1 m. The block is allowed to move in smooth horizontal slot with the help of constant force of 50 N in the rope as shown. The velocity of block as it reaches B is (assume the rope to be light)

(a) 4 m/s

(b) 2 m/s

(c) 1 m/s

(d) 3 m/s

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Asked by Samyuktha RP

Updated Mon, 01 Oct 2018 12:28 pm

  • NEET
  • 11th
  • Physics

Q.

1.Assertion:The position time graph of a body moving uniformly in a straight line parallel to position axis. Reason:The position time graph in a uniform motion gives the velocity of an object.

2.Assertion:Average speed is equal to total distance travelled divided by total time taken. Reason:The average speed of an object may be equal to arithmetic mean of individual speed. MY DOUPT: AVERAGE SPEED = \(\frac {(V_1+V_2)}2 \), FOR FIRST HALF OF TIME , the velocity is \(V_1\) and the NEXT HALF OF TIME, the velocity is \(V_2\).Form this situiation average speed may be equal to arithmetic mean of individual speed.

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Asked by Sivakumar.S

Updated Fri, 28 Sep 2018 12:57 pm

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