The family car runs out of gas. You have to push it up the driveway into a service station. The ramp is 4 meters long and rises
0.10 meters. The car weighs 9000 N. You push with a force of 300N. How efficient is the ramp?
1 answer:
Answer:
Step-by-step explanation:
slope, m = 0.1m/4m = 0.025
Theoretical effort (ignoring friction) = 9000N * 0.025 = 225 N
actual effort = 300 N
efficiency
= potential energy out / actual energy in
= 225 N / 300 N = 0.75
You might be interested in
Answer:
(2)/(3) =( 4)/( 3+x)
Cross multiply
2*(3+x)= 4*3
Solve bracket
6+2x=12
Subtract 6 from both sides
2x=6
Divide both sides by 2
x=3
Hope it helps :-)
The number that represents 8/9 to the nearest percent is .89
Answer:
110°
Step-by-step explanation:
Each tick line in a protractor shows 10°. So the next is 110° inclined.
10 of 1/6 (10 times 1/6) is 1 4/65 or 1 2/3 simplified. 5 of 1/3 (5 times 1/3) is
1 2/3
