A force of magnitude F=kt is applied at a fixed angle α above horizontal to a block of mass m on a smooth horizontal plane. Which results at the instant it just loses contact with the plane are correct?

Question

G1 Physics · Accepted Answer

Separation occurs when N=0, so kt sinα=mg. Horizontal acceleration is kt cosα/m. Integrating to that time gives the listed v and x. At separation N=0, so D is false.