Physics Final Exam

The steps of the scientific method, in order are:

• Question, Hypothesis, Experiment, Conclusion, Data, Communication

• Hypothesis, Question, Experiment, Conclusion, Communication

• Question, Hypothesis, Experiment, Data, Conclusion, Communication

• Question, Data, Hypothesis, Experiment, Conclusion, Communication

Bob runs from 4:50 pm until 5:20pm at an average speed of 7 km/hr. How far did he run? Show all your work to get any credit on this problem.

• 4.5 km

• 21.0 km

• 3.5 km

• 14 km

The president’s airplane, Air Force One, flies at 250 m/s to the east with respect to the air. The air is moving at 35 m/s to the north with respect to the ground. Find the velocity of Air Force One with respect to the ground. Show all your work to get any credit on this problem.

• 252 m/s

• 222 m/s

• 435 m/s

• 125 m/s

What is the total displacement of the object represented in this motion graph?

• 120 meters

• 100 meters

• 140 meters

• 200 meters

A late traveler rushes to catch a plane, pulling a rolling suitcase with a force directed 30.0° above the horizontal. If the horizontal component of the force on the suitcase is 60.6 N, what is the force exerted on the handle? Show all your work to get any credit on this problem.

• 52.5 N

• 105.0 N

• 70.0 N

• 121.2 N

An engineer is designing the runway for an airport. Of the planes that will use the airport, the acceleration is likely to be 3 m/s². The takeoff speed for this plane will be 65 m/s. What is the minimum allowed length for the runway? Show all your work to get any credit on this problem.

• 195 meters

• 10.8 meters

• 704 meters

• 4225 meters

Two people are pushing a stalled car. The mass of the car is 1850 kg. One person applies a force of 275 N to the car, while the other applies a force of 395 N. Both forces act in the same direction. A third force of 560 N also acts on the car, but in a direction opposite to that in the people are pushing.  Find the acceleration of the car.  Show all your work to get any credit on this problem.  

•  $\ .36\ \ \frac{m}{s^2}$  

•  $\ .24\ \ \frac{m}{s^2}$  

•  $\ .059\ \ \frac{m}{s^2}$  

•  $.302\ \ \frac{m}{s^2}$  

You work in a large distribution center where a 15 N net force is applied for 6 seconds to a 12 kg box that is initially at rest. What is the speed of the box at the end of the 6 second interval? Show all your work to get any credit on this problem.

• 1.8 m/s

• 3.0 m/s

• 7.5 m/s

• 30 m/s

The country's Patriot missile battery defense system is located on a 50 m high cliff and detects an incoming object. It launches a missile and intercepts the object at the maximum height of the missile's trajectory. If the launch angle is 60 degrees with the horizontal and the missile's initial velocity is 40 m/s, approximately how long does it take for the missile to hit the target?  Show all your work to get any credit on this problem.

• 3.0 s

• 2.75 s

• 3.5 s

• 4.0 s

A ceiling fan with 16 inch blades rotates at 45 rpm. Find the angular velocity of the fan in rad/min. Show all your work to get any credit on this problem.

• 90 rad/min

• 282.7 rad/min

• 45 rad/min

• 141.4 rad/min