A ball is thrown upward from the surface of the earth. Consider the following qu

Question

A ball is thrown upward from the surface of the earth. Consider the following quantities: the speed of the ball, 2) the velocity of the ball; 3) the acceleration of the ball. Which of these is (are) zero when the ball has reached maximum height? 1 and 2 1, 2 and 3 1 only 2 only 3 only In ideal projectile motion, when the positive y-axis is chosen to be vertically upward, the y-component of the velocity of the object during the ascending part of the motion and the y-component off the velocity during the descending part of the motion are, respectively, Positive, negative Negative, positive Positive, positive Negative, negative For a given initial speed of an ideal projectile, there is (are) ______ launch angle(s) for which the range of the projectile is the same. Only one Two different More than two but a finite number of Only one if the angle is 45. but otherwise two different An infinite number of In ideal projectile motion, when the positive x-axis is chosen to be horizontally rightward, the x-component of the velocity of the object during the ascending part of the motion and the r component of the velocity during the descending part of the motion are, respectively, Positive, negative. Negative, positive. Positive, positive.

Explanation / Answer

rate of change of position equalt to speed

at maximum height velocity and speed both are zero

1) correct option is (a)

2) correct option is (a)

3) correct option is (d)

Range R = u^2sin(2theta)/g

4) correct otpion is (c)

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