Question

Please answer the question no. 41 . Please. Moderators, brainly stars , physics Newton or other best user.

Answer 1

To find :

• the work done by the bullet
• the power generated by the bullet

Given :

• initial velocity, u = 0m/s
• final velocity, v = 20m/s
• time, t = 10 s
• mass of bullet, m = 10 g

Formula to be applied :

• work = ½ × m(v²-u²)
• power = work/time

Solution :

work = ½ × m(v²-u²)

= ½ × 10 (20²-0²)

= ½ × 10(400-0)

= ½ × 4000

= 2000 J

hence, Work done = 2000 J

Power = Work/time

= 2000/10

= 200 W

• work done by bullet = 2000 J
• power generated = 200 W

Other related Formula:

• Work done = Force × displacement
• unit of Power = W ( watt ) , Horsepower (hp)

Answer 2

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