Question

mr. rohit was driving a car of mass 1000 kg with a constant speed of 72 km/h to go to his office. suddenly he realized that he will be late for office and increased the speed of the car to 90 km/h in 10 seconds. a.tje change of momentum of the car b.the force produce by the automobile engin c.the accelaration produced by the automobile engin of the car


pls help me in this question​

Answer 1

Answer:

u=72km/h=20m/s

v=90km/h=25m/s

t=10

a=?

Explanation:

v= u+ at

25=20+10a

25-20=10a

5=10a

a=1/2=0.5 metre per second square

change in momentum

m1u1=m2v2

1000*20=1000*25

20000=25000

5000 change in momentum is 5000