Possible Essay Questions for Unit 2 Test
*Describe two differences between mass and weight.
*Describe how to determine average speed.
*Describe both speed and velocity, and state the difference between the two.
*Describe how unbalanced forces affect moving and nonmoving objects.
*You are a passenger in a car that is moving rapidly down a straight road. As the driver makes a sharp left turn, you are pressed against the right side of the car. Explain why this happens.
*Use Newton’s 3rd law to explain how a person hammering a nail into a block of wood is demonstrating conservation of momentum.
*Explain why a feather dropped from the same height as an acorn will fall to earth more slowly than the acorn.
*Imagine you are throwing snowballs. The snowball moves away from you at a velocity of 2m/s. What type of motion does the snowball exhibit? Explain your answer.
*How does free fall in an orbiting spacecraft cause the appearance of weightlessness?
*How can a skydiver benefit from air resistance?
*A 0.151kg baseball is pitched with a velocity of 43.1m/s. Ignoring air resistance, what is the baseball’s momentum after being pitched? Show your work.
*You are part of a team that is raising a sunken ship from deep underwater. Several members of the team suggest inflating large balloons inside its hull. Do you agree? Explain why or why not.
*You have been given two different fluids with unknown densities, How could you determine which fluid is more dense without mixing the two fluids together.
*Wood usually floats, but some types of wood are more buoyant than others. For example, a m3 of balsa is more buoyant than a m3 of oak. Explain why this is true.
*Why does pressure increase as the depth of the water increases?
*Pilots have to adjust the plane’s wing flaps throughout a flight. Explain the purpose of these adjustments.