SOLUTION: if a car accelerates and move at a constant speed of 40km/h and reaches 80 km in 3 hours,and then de accelerates and come back at same speed of 40km/h and reaches 40 km in 3 hours,
Algebra.Com
Question 647319: if a car accelerates and move at a constant speed of 40km/h and reaches 80 km in 3 hours,and then de accelerates and come back at same speed of 40km/h and reaches 40 km in 3 hours,then what we have done in 6 hours as displacement is zero for the car.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
if a car accelerates and move at a constant speed of 40km/h and reaches 80 km in 3 hours,
-----------
If it moves at 40 km/hr for 3 hours, it won't go 80 km, it'll go 120 km.
------------------
and then de accelerates and come back at same speed of 40km/h and reaches 40 km in 3 hours,
40*3 = 120, not 40
--------------------
then what we have done in 6 hours as displacement is zero for the car.
RELATED QUESTIONS
kinematic question:a highway patrol at rest is passed by a bus travelling at constant... (answered by KMST)
A stationary police car spots a vehicle travelling at speed. The police car accelerates... (answered by ankor@dixie-net.com)
A car travels at a constant speed of 60 km/h for hours, stops for half an hour and then (answered by lwsshak3)
a car starts from rest and accelerates at the rate 2 meter per second square to 50 km/h.... (answered by Alan3354)
How long does it take a car to cross a 30.0 m wide intersection after the light turns... (answered by ikleyn)
car 1 quickly accelerates to aprox 75mph, stays there then slows down to a stop at 3.5... (answered by ikleyn)
a is acceleration
v0 is initial velocity (speed),
v is final velocity
t0 is initial (answered by solver91311)
A family takes a car trip. They travel for an hour at 90 km/h and then for two hours at... (answered by Alan3354,Fombitz)
A truck heads north at a constant speed of 80 km/h. A car leaves 20 minutes
later... (answered by josgarithmetic,MathTherapy)