Hi ...I came up another question again i guess you will help me out .Here is the question(adsbygoogle = window.adsbygoogle || []).push({});

1. A long jumper takes off at an angle of 20 degree with the horizontal and reaches a maximum height of 0.55 m at mid-flight.

- how long is she in the air?

- what is the forward component of her velocity?

- how far does she jump?

Here is what i try.

A. how long is she in the air.

i use the formula Y= vt + 1/2gt^2

which is -0.55 = 1/2 * -9.8 t^

so t= 0.335 sec and finaly i multiplay 0.335 * 2 = 0.67 sec.

B. here is where i stop how can i find her velocity with out knowing the horizontal distance.

i know the formula X = vt

thank you.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Kinematics long jumper problem

**Physics Forums | Science Articles, Homework Help, Discussion**