Danny asked in Science & MathematicsPhysics · 1 month ago

# How do you solve this physics question?

A skier leaves a horizontal ski jump with a horizontal velocity of 23.1 m/s. The instant before she

lands 2.96 seconds later, determine her speed.

Update:

according to the answer key the answer is 37.1m/s I need someone to show me how to get that answer.

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• Whome
Lv 7
1 month ago

Presumably we ignore air resistance, Not a very good approximation for a ski jumper who generally tries to become a wing to generate lift and stay in the air longer.

v = √(vx² + vy²)

v = √(23.1² + (2.96(9.81))²)

v = √(23.1² + 29.0²)

v = 37.0757...≈ 37.1 m/s

• John P
Lv 7
1 month ago

Ski jumpers also do not land on level ground - the impact would kill them. They land on a steep slope well below the level of the take-off ramp. They then ski down to a gradually reducing slope, then level ground where they can stop safely.

I assume that all of those factors were taken into account by the person who set the question.

• 1 month ago

v = 37.0757...≈ 37.1 m/s

• 1 month ago

thank you so much for answering this was really bothering me.