A car, initially traveling at 20 m/s to the east, accelerates toward the west at
ID: 2119326 • Letter: A
Question
A car, initially traveling at 20 m/s to the east, accelerates toward the west at 2.0 m/s2. At the same time that the car starts, a truck, 60 m west of the car and moving at 16 m/s toward the east, starts to move faster, accelerating at 1.0 m/s2. It%u2019s a one-lane road and both drivers are too busy fiddling with their CD players to notice each other.
Object: Object:
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
A car, initially at rest, accelerates toward the west at 2.0 m/s2. At the same time that the car starts, a truck, 350 m west of the car and moving at 16 m/s toward the east, starts to move slower, accelerating at 1.0 m/s2. The car and truck pass safely.
Object: Object:
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
Event 1:
t1 =
r1 =
v1 =
a12 =
Event 2:
t2 =
r2 =
v2 =
Explanation / Answer
t1=t2=0;
r1=0, r2=-60;
v1=20, v2=16;
a12=a1-a2= -2-1=-3 ( 3 m/s2 towards west. I've taken towards east as positive direction)
For the second question:-
r1=0;r2=-350;
v1=0; v2=16m/s;
a12=a1-a2= -2-1=3 m/s2
( 1 m/s^2 is deceleration, or negative acceleration, as the truck goes slower)
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.