This test will consist of multiple choice problems and short answer problems. Pick the best answer of the choices given. For the short answer, in addition to the correct answer, write enough information to show that you understand the material. This is a timed test. You will have one hour from the time you start to complete the test. If for any reason you cannot complete the test in the required time, you must contact the instructor.

Two window washers are on a scaffold. The scaffold weighs 70 lb, the man on the left weighs 180 lb, and the man on the right weighs 195 lb. The left support has a force of 310 lb in the cable. What is the force in the right cable?

You are in an enclosed van moving at a constant speed and throw your game controller straight up. a. Will the controller fall ahead of you, behind you, or right where you are? Now, you are in a convertible moving at a constant speed and throw your bouquet straight up. b. Will the bouquet fall ahead of you, behind you, or right where you are? c. What accounts for the difference?

Which of the following are accelerating? a. A Volkswagen coming to a stop at a red light b. A Buick going from 0 mph to 60 mph in 12 seconds c. An SUV turning a corner at a constant speed d. A Camaro moving at 70 mph e. A Sedan turning a corner, slowing from 30 mph to 20 mph

Barrack Obama fires a 8 g bullet out of a 5 kg rifle at a speed of 95 m/s. (a) What is the recoil speed of the rifle? (b) When the bullet hits the target, it takes 0.35 s to stop. (c) What force does the bullet apply on the target?

A bow is drawn so that it has 50 J of potential energy. When fired, the arrow will ideally have a kinetic energy that is

Suppose you made a hole all the way through the middle of the Earth. (a) If you fell in the hole, would the force of gravity increase or decrease? (b) If your acceleration due to gravity is 10 m/s2 when you enter the hole, what is the acceleration at the center of the Earth (include direction)? (c) What is the acceleration due to gravity when you exit the other side (include direction)?

A butter gun fires butter out of a gun to a piece of bread which covers one piece of bread at a distance of 1 foot. (a) How many pieces of bread will the butter gun cover if the target is moved back to 2 feet? (b) How thick is the butter compared to the first piece of bread? (c) How many pieces of bread will the butter gun cover if the target is moved back to 3 feet? (d) How thick is the butter compared to the first piece of bread?

Q2 In a control system, the actuating signal is:

Below is a picture of a vibrating string. (a) What kind of wave is this? (b) The instructor sets the frequency to 25 Hz in the first picture. He then changes to a new frequency. How many nodes are there in the first picture? (c) How many antinodes? (d) How many nodes are in the second picture? (e) How many antinodes? (f) What is the frequency associated with the second picture? before.jpgafter.jpg