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Mr. H ignites the enthusiasm of the class with a home-made cannon demonstration. The 1.27-kg cannon is loaded with a 54-gram tennis ball and placed on the floor. Mr. H adds the fuel, waits for its vapors to fill the reaction chamber and then brings a match nearby. The explosion stuns the crowd and propels the ball forward. A photogate measurement determines that the cannon recoiled backwards with a speed of 7.8 m/s. Determine the speed of the ball.

Respuesta :

Answer:

Explanation:

Applying conservation of momentum

mv = MV

M and V are mass and velocity of recoil of canon , m and v are mass and velocity of tennis ball

54 x 10⁻³ x v = 1.27 x 7.8

v = 1.27 x 7.8 / 54 x 10⁻³

v = 183 m/s.

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