What are the advantages of using a telescope compared to making observations with the naked eye?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.