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At a certain instant, a fly ball has velocity v(vector)=25i-4.9j x axis is horizontal, y axis is upward, v is in m/s. Has the ball passed its highest point? the answer is supposed to be NO but the y velocity is -ve so shouldn't the answer be YES?

At a certain instant, a  fly ball has velocity v(vector)=25i-4.9j


x axis is horizontal, y axis is upward, v is in m/s.


Has the ball passed its highest point?


the answer is supposed to be NO


but the y velocity is -ve so shouldn't the answer be YES?

Grade:

3 Answers

G Narayana Raju
51 Points
11 years ago

he must have taken downward direction of y-axis as +ve and upward as -ve.

so the ball did not still pass the highest point.

Umer Farooq
15 Points
2 years ago
As the y component of velocity has negative direction which indicates that body is moving downward that's why it has passed it's highest point! So the answer is yes!
Misho Kurashvili
26 Points
one year ago

yes, since it’s -4.9j it means that projectile has negative acceleration (to positive y axes) and because we know that acceleration constant is 9.8m/s we can assume that projectile passed it’s maximum height 0.5 seconds ago.

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