Question

To test a 0.80 kg ski helmet, it is placed at a certain height from the ground and dropped onto a force detector placed on the ground. The pulse is 0.39 N • s for an interval of 0.050 s when it hits the force detector. What is the force recorded by the force detector?

Answer 1

We can find the force recorded by the force detector from the impulse momentum change equation:

$$J=F\Delta t,$$ $$F=\dfrac{J}{\Delta t}=\dfrac{0.39\ N\cdot s}{0.050\ s}=7.8\ N.$$

Answer:

$F=7.8\ N.$