An open knife edge of mass 200 g is dropped from height 5 m on a cardboard
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
An open knife edge of mass 200 g is dropped from height 5 m on a cardboard. If the knife edge penetrates distance 2 m into the cardboard, the average resistance offered by the cardboard to the knife edge is (g=10m/s2)
(1) 7 N
(2) 25 N
(3) 35 N
(4) None