Jamal is in a car going north. he looks out the window and thinks that the northbound traffic is moving very slowly. ellen is in a car moving south. she thinks the northbound is moving quickly. explain why jamal and ellen have different ideas about the motion of the traffic.

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.