Question

Projectile Motion

Use either methods from Kinematics or Energy Conservation

A brother and a sister make a bet who can throw a pebble farther from the edge of cliff. The brother throws horizontally at v₀= 36[m/s]. The sister throws at a 60° angle above the horizontal with v₀= 28[m/s]. The cliff is 20[m] high.

Hint: Use g = 10 [m/s²]

1. Whose pebble lands first? Show your work.

2. At three quarters the height of their respective highest points, whose pebble is faster? Show your work.

Answer 1