It takes a 100 kilogram 15.0 seconds to travel an unbanked circular track with a diameter of 20.0 m. Calculate the frictional force between the tires
and the pavement.

Modify the equation fδt=δ (mv) to find the force of friction.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

What structural formula represents 4 electrons shared between two atoms?