PRACTICE QUIZ 6B

Answer the following.  Show all work and circle your answers.

1. Name four vector quantities.

 

2. Name four scalar quantities.

 

3. A 12 N force and a 28 N force act in opposite directions upon the same point of an object. What is the magnitude of their resultant?

 

 

4. A bus drives 330 m north, makes a left turn, then continues another 85 m to the bus stop. What is the displacement for the trip (remember to give both magnitude and direction)?

 

 

 

5. A certain airplane has an airspeed of 110 km/h at full throttle. The wind is blowing due east at 40 km/h.

a. Given these conditions, what is the maximum velocity the plane can fly relative to the ground (magnitude and direction)?

 

b. Given these conditions, what is the minimum velocity the plane can fly (still at full throttle) relative to the ground (magnitude and direction)?

 

6. A boat is heading across a river that is flowing 3 km/h south. The boat would have a speed of 10 km/h in still water.

a. Assuming the river is 180 m wide, how long would it take the boat to cross the river?

 

b. How far downstream would the boat be when it reached the other side?

 

c. What is the resultant velocity of the boat crossing the river (magnitude and direction)?

 

 

 

 

7. Two farmers ar trying to remove a tree stump from a field by pulling with their tractors as shown in the diagram below. Farmer Bob pulls with a force of 2200 N and Farmer Sue pulls 3100 N. What is the net force on the stump (magnitude and direction)?