Robin leaves the long jump takeoff board with a vertical velocity of 2.5 m/s upward and a horizontal velocity of 6 m/s. Robin is in the air for 0.6 seconds before she hits the ground. Robin's center of gravity was 0.8 m high (relative to the ground) at the instant of takeoff. Assume that the effect of air resistance is negligible and that the upward direction is positive.

4. What is Robin's maximum height (relative to the ground)?

5. What is her horizontal displacement from the point of takeoff?

6. How high will Robin's center of gravity be at the time she lands (relative to the ground)?

7. What is Robin's vertical velocity at the time she lands? (as for all projectile motion problems, assume this is the instant "just" before she actually hits the ground when she is still a projectile)