Question 1

Which of the following objects is accelerating?

1. A ball bouncing down the street
2. A person sitting on a bike at an intersection
3. A train moving north at a constant speed of 60 mph
4. A plane flying west at a uniform velocity of 30 m/s

Question 2

Which of the following is an example of a vector?

1. Acceleration
2. Mass
3. Speed
4. Temperature

Question 3

A bird flies 75 m due east, then 150 m northeast (60 north of east). What is the bird's net displacement?

1. 74 m, 41 degrees north of east
2. 74 m, 41 degrees north of east
3. 198 m, 41 degrees north of east
4. 209 m, 49 degrees north of west

Question 4 The graph here shows the position of a particle as a function of time as it travels along the x-axis. Position is given in the unit meter, and time is in seconds.