Cannon Fire! Senior Physics Research Project

[Michael17]

Cannon Fire!

Can anyone please help me figre this one out;

A senior physics class conducting a research project on projectile motion constructs a device that can launch a cricket ball. The launching device is designed so that the ball can be launced at ground level with an initial velocity of 28m/s at an angle of 30 degrees to the horizontal. At what time will the ball reach its maximum height?

 

[LowlyPion]

Figure the vertical velocity component from the angle.

Divide by the magnitude of gravity that is acting to slow it down.

That's your time.