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Above a flat horizontal plane, arrow A is shot horizontally from a bow at a speed of 20 meters per second, as shown in the following diagram. A second arrow B is dropped from the same height and at the same instant as A is fired. Compare the amount of time A takes to strike the plane to the amount of time B takes to strike the plane. [Neglect friction.]

Answer :

It takes same time for A and B to strike the plane.

Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.

When a particle is thrown obliquely near the earth’s surface, it moves along a curved path under constant acceleration directed towards the centre of the earth. The path of such a particle is called a projectile, and the motion is called projectile motion.

  • Given above a flat horizontal plane, arrow A is shot horizontally from a bow at a speed of 20 meters per second.
  • Also a second arrow B is dropped from the same height and at the same instant as A is fired.
  • Since height and speed are same along with initial position, there will be no change in time.

So both A and B strikes the plane at same time.

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