Newton's equations of motion

timer Asked: Jan 12th, 2013

Question Description

2. A runner, starting from rest, accelerates at 4 m/s2 east for 10 seconds. She then sees a group of long­distance runners ahead and turns due south, accelerating from her previous speed to 20 m/s in 2 seconds to catch up with them. Show all formulas and steps to solution to earn full points.

A. What is the velocity of the runner after the initial leg (due east)? 

B. How far does the runner go during this first leg of the trip? 

C. What is her acceleration during the second leg of the trip? 

D. What is the total displacement (magnitude and direction) of the runner for the whole trip so far?

E. After joining the group of runners at the group's initial speed, the runner encounters a wind blowing from east to west at 18 m/s. What will the actual velocity of the runner be (magnitude and direction), relative to the ground?  

This question has not been answered.

Create a free account to get help with this and any other question!

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors