A 46.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 136 m/s from the top of

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A 46 0 Kg Projectile Is Fired At An Angle Of 30 0 Above The Horizontal With An Initial Speed Of 136 M S From The Top Of 1 (122.81 KiB) Viewed 26 times

A 46.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 136 m/s from the top of a cliff 170 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) 502044 J (b) Suppose the projectile is traveling 96.4 m/s at its maximum height of y = 363 m. How much work has been done on the projectile by air friction? -124665.52 J (c) What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times ..as much.work.on the projectile when it is going down as it did when it was going up? Enter a number. differs from the correct answer by more than 10%. Double check your calculations. m/s Need Help? Read It Submit Answer