- #1
kmikias
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Hi ...I came up another question again i guess you will help me out .Here is the question
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 without knowing the horizontal distance.
i know the formula X = vt
thank you.
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 without knowing the horizontal distance.
i know the formula X = vt
thank you.