Friction exists only when two objects rub against each other.
a. true
b. false

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Which planets are visible without a telescope

Which of the following is tru about semi-conductors