A car of mass $$\(1250 \mathrm{~kg}\)$$ is moving on a straight road. On a horizontal section of the road, the car has a constant speed of $$\(32 \mathrm{~m} \mathrm{~s}^{-1}\)$$ and there is a constant force of $$\(750 \mathrm{~N}\)$$ resisting the motion. Calculate, in $$\(\mathrm{kW}\)$$, the power developed by the engine of the car. ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................
Exam No：9709_s20_qp_42 Year：2020 Question No：5(a)(i)
Answer:
$
D F=750
$
Power \(=\operatorname{their}(750) \times 32\)
$
=24 \mathrm{~kW}
$
D F=750
$
Power \(=\operatorname{their}(750) \times 32\)
$
=24 \mathrm{~kW}
$
Knowledge points:
4.5.4 use the definition of power as the rate at which a force does work, and use the relationship between power, force and velocity for a force acting in the direction of motion Including calculation of (average) power;P = Fv
Solution:
Download APP for more features
1. Tons of answers.
2. Smarter Al tools enhance your learning journey.
IOS
Download
Download
Android
Download
Download
Google Play
Download
Download