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23 Nov 2019

A rifle with a weight of 35 N fires a 4.5 g bullet with a speed of240 m/s.

a)find the recoil speed of the gun in m/s
b)If a 650 N man holds the rifle firmly against his shoulder, findthe recoil speed of the man and rifle in m/s.

A 715 N man stands in the middle of a frozen pond of radius 4.0 m.He is unable to get to the other side because of a lack of frictionbetween his shoes and the ice. To overcome this difficulty, hethrows his 1.2 kg physics textbook horizontally toward the northshore at a speed of 4.0 m/s. How long does it take him to reach thesouth shore? (in seconds)

A 75.0 kg ice skater moving at 9.00 m/s crashes into a stationaryskater of equal mass. After the collision, the two skaters move asa unit at 4.50 m/s. If the impact time is 0.115 s, what are themagnitudes of the average forces experienced by each skater duringthe collision?

Force experience by moving skater in N.

Force experience by stationary skater in N.

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Deanna Hettinger
Deanna HettingerLv2
29 Jun 2019

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