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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
12 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
3 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
2 years 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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