Question

4. A door stop is used to hold open a door.

a. If the door stop is 10 cm long and 3 cm high, what is the mechanical advantage of the door stop?

b. If the door exerts a force on the doorstop of 50 N what is the force the doorstop exerts on the door? Assume no friction.

Answer 1

a)

$$MA=\frac{10}{3}=3.33$$

b)

$$F=3.33(50)=167\ N$$