An 860-kg Smart Car has an acceleration of 0.75 ms-2. What is the work done by the net force acting on the car if it travels 45 meters

29025 J

Explanation:

In physics work is the product of force and distance but according to Newton's law, force is the product of mass and acceleration.

Hence;

F =ma

W=Fs

Therefore;

W= mas

From the question;

m= 860 kg

a= 0.75 ms-2

s= 45 meters

W= 860 * 0.75 * 45

W = 29025 J

snell's law

refractve index = sin incidence / sin refraction

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j