- A javelin is launched horizontally at 5 m/s. It lands 15 metres horizontally from its launch point.
a) Calculate the time that the javelin is in the air for.
b) Calculate the final vertical velocity of the javelin.
c) Using a scale diagram or otherwise, find the size of the final resultant velocity of the javelin and the angle of impact.
- A ball rolls off a table top with a horizontal speed of 2.0 m/s. The ball hits the ground 0.3 seconds later.
a) Calculate the horizontal distance that the ball lands from the table top.
b) Calculate the final vertical speed of the ball.
c) Sketch a velocity-time graph of the vertical motion of the ball.
d) Use the graph to find the height of the table.
- Explain how an artificial satellite such as the International Space Station remains in orbit around the Earth.
