a Calage of Caring H * D Awarents - 13: C Sping 23 Deprise to 6 a bail at money

Question

a Calage of Caring H * D Awarents - 13: C Sping 23 Deprise to 6 a bail at money 3 by G e a Score http://ccute physic.illinois.edu/phys101 1ju2017/practice practiceplexem2/sp00 a hammer thenticity a xG A Las lig inck Sidor G A Studian Traer has G A31 kg Blace a hotel X A Fastest xD E. - Ox a trol QUESTION 6* A ball of mass 0.15 kg is thrown directly against a wall with an initial speed of 18 m/s. It bounces straight backward (in the opposite direction) with a final speed of 10 m's. The contact time between the ball and wall is 1.5x 10 s. What is the magnitude of the average force exerted on the ball by the wall during the contact time? O (a) 2800 N (b) 5100 N. O (c) 6667 N O (d) 1200 N O (e) 18667N I E lot

Explanation / Answer

Applying Impulse = change in momentum = F.t

m (vf - vi) = F t

0.15 ( - 10 - (18)) = F (1.5 x 10^-3)

- 4.2 = 1.5 x 10^-3 x F

F = - 2800 N

magnitude of force = 2800 N

Ans(a)

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