Question

A 125-g bullet is fired from a rifle having a barrel 0.580 m long. Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 16,000 + 10,000x − 26,000x², where x is in meters.

(a) Determine the work done by the gas on the bullet as the bullet travels the length of the barrel. (Enter your answer to at least two decimal places.)
________ kJ

(b) If the barrel is 0.95 m long, how much work is done? (Enter your answer to at least two decimal places.)
_________ kJ

(c) How does this value compare with the work calculated in part (a)?

The work is greater by _____%.

Answer 1

0 16000, b 10,000, C26,000 Q) Hete 000) 534 (24, c 92 go t 1 68 2-1 690 . 9千 : b Heote し): 16000)(095)-H10,000/c.95),(-2600t)) 缶: 15,200+4,512-5 480.5 ニ 12,282丁 fercentage in0toate : (12/282-92千103) t (-2600t 3 9? 1.0.3 ごロ. 324寸