Monday
September 15, 2014

Homework Help: mitx 8.01x Classical Mechanics

Posted by youlife on Tuesday, September 10, 2013 at 7:14pm.

During a track event two runners, Mary, and Alice, round the last turn and head into the final stretch with Mary a distance d = 2.0 m in front of Alice. They are both running with the same speed of v0= 5.0 m/s. When the finish line is a distance L= 45.0 m away from Alice, Alice accelerates at aA = 1.5 m/s2 until she catches up to Mary. Alice then continues at a constant speed until she reaches the finish line.

(a) How long (in s) did it take Alice to catch up with Mary?

(b) How far (in m) did Alice still have to run when she just caught up to Mary?

(c) How long (in s) did Alice take to reach the finish line after she just caught up to Mary?

Mary starts to accelerate when Alice just catches up to her, and accelerates all the way to the finish line and crosses the line exactly when Alice does. Assume Mary's acceleration is constant.

(d) What is Mary's acceleration (in m/s2)?


(e) What is Mary's velocity at the finish line (in m/s)?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Classical Mechanics - During a track event two runners, Mary, and Alice, round ...
physics - During a track event two runners, Mary, and Alice, round the last turn...
Physics - During a track event two runners, Mary, and Alice, round the last turn...
mitx 8.01x Classical Mechanics - Mary wants to throw a can straight up into the...
MITx: 8.01x Classical Mechanics - Mary wants to throw a can straight up into the...
math - jen can run at 7.5 m/s and mary at 8.0 m/s. on a race track jen is given ...
science - Mary is driving on a straight road. Suddenly a deer jumps out in front...
mitx 8.01x Classical Mechanics - The vectors A⃗ = 1 x^− 2 y^ and B...
physics - Mary and John are on opposite sides of a seesaw. Mary has 3x the mass ...
MITx: 8.01x Classical Mechanics - An object of mass m is released from rest at a...

Search
Members