Numeric: A numeric value is expected and not an expression. A bullet with a mass

Question

Numeric: A numeric value is expected and not an expression. A bullet with a mass of m = 16 g is shot out of a rifle that has length L = 0.86 m. The bullet spends t = 0.12 sin the barrel. Calculate the magnitude of the bullet's acceleration, in meters per second squared, as it travels through the rifle's barrel. You may assume the acceleration is constant throughout the motion. Numeric: A numeric value is expected and not an expression. What is the numerical value of the net force F_NET in newtons acting on the bullet? Numeric: A numeric value is expected and not an expression. F_NET = ____ A semi is traveling down the highway at a velocity of v = 26.5 m/s. The driver observes a wreck ahead, locks his brakes, and begins to slide.

Explanation / Answer

9. (A) Applying L = vi t + a t^2 /2

0.86 = 0 + (a x 0.12^2) /2

a = 119.44 m/s^2

(B) F = m a

F = (16 x 10^-3 kg) (119.44 m/s^2)

F = 1.91 N

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