Calculate the power (in kW) required
by the engine of a car travelling at the constant speed of 50 m/s. If the car
has to resist a wind drag FD 20v (in N) where v is the velocity of the car.
50 मीटर/सेकेंड की स्थिर गति से यात्रा करने वाली कार के इंजन द्वारा आवश्यक शक्ति (किलोवाट में) की गणना करें। यदि कार को हवा के झोंके का प्रतिरोध करना है तो FD 20v (N में) जहां v कार का वेग है।
20
25
50
75
50
Given :Speed of the car (v) = 50m/s
Wind drag force (FD) = 20v (in N)
..Method 2..
We know that,
Power
Hence, the correct option is (C).
..Method 2..
As we know that, 
Where, W = Work done
=
Force (F) 
Distance (d)
Then, P x t FD x d
Hence, the correct option is (C).
Preparing students for success in a changing World.
We care about our students
RPSC-AE, RSMSSB-JE, SSC-JE, RRB-JE, PSU's