Please solve this with in 30 minutsQ5. Tom is travelling on a train which is moving at a constant speed of 15 m son a ho

[answerhappygod]

Please solve this with in 30 minutsQ5. Tom is travelling on a
train which is moving at a constant speed of 15 m son a horizontal
track. Tom has placed his mobile phone on a rough horizontal table.
The coefficient of friction between the phone and the table is 0.2.
The train moves round a bend of constant radius. The phone does not
slide as the train travels round the bend. Model the phone as a
particle moving round part of a circle, with centre O and radius
metres. Find the least possible value of r