# (solution) PHY 1001 Unit Two – Motion in 2 and 3 Dimensions Mathematical

Assignment 2. Please help answer the questions on this assignment. Need complete explanations so I can learn. Most helpful will be given for complete response to the document.

PHY 1001
Unit Two ? Motion in 2 and 3 Dimensions
Mathematical Assignment
1. Identify the vector and scalar quantities from the following list. {Temperature,
weight, displacement, velocity, speed, time, mass, acceleration}
Vector Scalar 2. A hiker walks along the city streets 4.0 km north, then 3.0 km west. What is the
magnitude of the resulting displacement vector? Key Idea Stock of Data and Solution Sanity Check 3 From the previous problem, what is the direction of the displacement vector in
degrees from North? Round to 2 digits. Key Idea Stock of Data and Solution Sanity Check 4. Proceeding from landmark A, a vehicle moves along city streets 10 km north,
then 14.2 km northeast, and finally 2 km south, and arrives at landmark B. What is
the distance traveled, and the magnitude of the displacement between the two
landmarks? Key Idea Stock of Data and Solution Sanity Check 5. From the previous problem, what angle east of north does the displacement
vector lie? Key Idea Stock of Data and Solution Sanity Check 6. Calculate the centripetal acceleration (in m/s2) of a car traveling 20 m/s around a curved road with a radius of 10 m.
Key Idea Stock of Data and Solution Sanity Check 7 A hot air balloon travels 60 degrees north of east at 2 km/hr . In 2 hours time how
far eastward and northward will the balloon have traveled? Key Idea Stock of Data and Solution Sanity Check 8. A rock is launched with an initial velocity of 10 m/s at an angle of 45 degrees
above the horizontal. What is the horizontal component of its velocity? Key Idea Stock of Data and Solution Sanity Check 9. A rock is launched over level ground with an initial velocity of 15.0 m/s at an
angle of 20 degrees above the horizontal. What is the projectile?s time of flight? Key Idea Stock of Data and Solution Sanity Check 10. An inflatable life raft is released from an air plane at 500 m altitude, in level
flight, with an air speed of 20 m/s in the horizontal direction. How long before the
raft strikes the water? How far from the release point does the raft strike the water? Key Idea Stock of Data and Solution Sanity Check 