What is the work done to increase the velocity of a car 36 km 72 km if the mass car is 1500kg.
Answers
Answered by
0
Answer:
45678910231234321684
Answered by
1
Mass of car m = 1500 kg Initial velocity = 54 km/h = 54 x 5/18 = 15m/s
Final velocity = 72 km/h = 72 x 5/18 = 20 m/s
(1 km/h = 1000 m/ (3600 s) = 5/18 m/s
Initial kinetic energy = 1/2 mv2
= ½ x 1500 x (15)2
= 168750 J
Increased kinetic energy = 1/2 mv2
= 1/2 x 1500 x (20)2
= 300000 J
Work done = Change in kinetic energy = 300000 - 168750 = 131250 J
Hence the work done by the force on the car = 131250J
Similar questions