What is the average friction force when a person has a usual 1 km walk?

Find the average frictional force needed to stop a a car weighing 500 kg in a distance of 25 m (the initial speed is 72 km/h.)

What is the angle between frictional force and isntantaneous velocity of a body moving over a rough surface

You accelerate your car forward. What is the direction of the frictional force on a package resting on the floor of the car?

What is the average speed of the car if it covers 200 km in 5 h?

A car of mass 1500 kg is moving with a speed of 12.5 ms^(-1) on a circular path of radius 20 m on a level raod what should be the frictional force between the car and the raod so that the car does not slip what should be the value of the coefficent of friction to attain this force

What is the angle of friction between two surfaces in contact if the coefficient of friction is (1)/sqrt(3)

When a bicycle moves in the forward direction what is the direction of the frictional force in the rear and front wheels