The froghopper (Philaenus spumarius), the champion leaper of the insect world, has a mass of 12.3 mg
. It can leave the ground with a speed as high as 4.0 m/s
in the vertical direction. The jump itself lasts a mere 1.0 ms
before the insect is clear of the ground. Assuming constant acceleration, find the force that the ground exerts on the froghopper during its jump.
In Part A, you defined the coordinate system to have the positive y direction pointing upward. Give the directions of the normal force n⃗
exerted by the ground on the froghopper and the froghopper's weight w⃗
using this coordinate system.
Give the direction of the normal force followed by the direction of the weight separated by a comma. For instance, if you thought that both were directed downward, you would enter -,-.