You and a frien together apply a force of 1000N to a 3000N automobile to make it roll 10m in 1 minute and 40 secs. How much work did you and your friend do togethe ?
2007-01-11 00:42:38 · 5 answers · asked by Brenda B 1 in Science & Mathematics ➔ Physics
t = 100 s frictional resistance = 0 (say)
Work Done = (Force in the direction of motion) x (Distance covered in that direction)
Total W.D = 1000 N X 10 m = 10000 J
2007-01-11 02:09:03 · answer #1 · answered by rohit_tag8000 1 · 0⤊ 0⤋
total force=2000N
Distance=10m
Total work done=2000*10=20,000N.m
As you neither mentioned how you lifted the automobile parallel or perpendicular to the surface of the earth nor gave the angle in which you lifted the automobile.
2007-01-11 09:20:32 · answer #2 · answered by Haritha 2 · 0⤊ 0⤋
Work done = Force * Distance moved. If the auto generates the force in the direction of motion, total force = 4,000N
Work = 4,0000* 10 Joules
Power = Work/Time = 40000/100sec = 400Watt
2007-01-11 08:58:28 · answer #3 · answered by Paleologus 3 · 0⤊ 1⤋
work done =force applied*dist travelled.
here force applied is 1000N
opposing force=ground friction.
coefficient friction of staticfriction is not stated in data.
Assume it is .2
opposing force=normal reaction*coefficient
=3000*.2=600N
Net force=1000-600=400N
work done=400N*10m=4000joules.
[can not use time data provided]
2007-01-11 11:13:24 · answer #4 · answered by openpsychy 6 · 0⤊ 0⤋
Work is (force times distance).
The time element relates to power, hence horsepower.
.
2007-01-11 09:00:34 · answer #5 · answered by james 3 · 0⤊ 0⤋