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A player throwsa a ball upwards with an...

A player throwsa a ball upwards with an initial speed of `29.4 ms^(-1)`.
(i) What is the direction of acceleration during the upwared motion of the ball?
(ii) What are the velocity and acceleration of the ball at the highest point of its motion?
(iii) Choose the x=0 and t=0 to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of X-axis, and give the signs of positive, velocity and acceleration of the ball during its upward, and downward motion.
(iv) To what height does the ball rise and after how long does the ball return to the player's hand?( Take g`=9.8 ms^(-2)`, and neglect air resistance).

Text Solution

Verified by Experts

At the highest position of the ball projected verticall upwards the velocity is zero and accelration is equal to acceleration due to grav ity (=9.8 ms^(p-1)) acting vertically downward.
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A player throws a ball upwards with an initail speed of 129.4 ms^(-1) (a) What is the direction of acceleration during the upward motion of the ball ? (b) What are the velocity and accleration of the ball at the ighest point os its motion. ( c) Choose the =x 0 aand t= 0 be the loction and time at its highest point, vertically downward direction to be the positve direction of X-axis and give the signe of position, velocity and accelration of the ball during its upward, and downward motion. (d) To what hight does the ball rise and after how long does the ball returns to the plausr s hands. (Take g= 9.8 ms^(-23) and begleact air resistance)

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Knowledge Check

  • In case of a projectile motion, what is the angle between the velocity and acceleration at the highest point?

    A
    `0^(@)`
    B
    `45^(@)`
    C
    `90^(@)`
    D
    `180^(@)`

  • When a projectile is at the highest point of its trajectory, the directions of its velocity and acceleration are

    A
    Parallel to each other
    B
    anti-parallel to each other
    C
    inclined to each other at an angle of 45 degree
    D
    perpendicular to each other

  • A ball thrown vertically upwards with an initial velocity of 1.4 m//s. The total displcement of the ball is

    A
    `22.4cm`
    B
    zero
    C
    `44.8m`
    D
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