Question

what will the work done be when A bullet of mass 10 grams at rest is accelerated to a velocity of 20 metre per second in 10 seconds calculate the power developed by the bullet during 10 seconds​

Answer 1

For calculating work we need Force and Displacement ;

v=20 m/s

u=0 m/s (at rest)

t=10 s

v= u+at << Formula

20=0+10a

a= 2m/s^-2

m= 10g=1/100 kg

F=ma=1/100*2=1/50 N

v^2-u^2=2aS << Formula

400-0=4S

S=100 m

W=F*S << Formula

W=1/50*100=2J

P=W/t << Formula

P=2/10= 0.2 W

Answer 2

Answer:

Work done (W) = 2 Joules and Power (P) = 0.2 Watt

Explanation: