A1500-kg car accelerates from 0 to 25 m/s in 7.0 s with negligible friction and air resistance. what is the average power delivered by the engine? (1 hp = 746 w)

Average power=89.8 hp

Explanation:

According to work energy theorem,

Work done= change in kinetic energy

W= 1/2 m Vf²-1/2 m Vi²

m= mass= 1500 Kg

Vi= initial velocity=0

Vf= final velocity= 25 m/s

w= 1/2 (15000(25)²- 1/2 (1500)(0)²

W=468750 J

now power= work / time

P=468750/7

P=66964 W= 66964/746=89.8 hp

so P=89.8 hp

close lines strong magnet less close weaker

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force