A stone is thrown vertically upward with an initial velocity of 20 m/s. Air resistance is...

A stone is thrown vertically upward with an initial velocity of 20 m/s. Air resistance is considered negligible. (1) At what time does it reach the peak? (2) What is the maximum height it reaches? (3) What is speed of the stone just before it hits the ground?

The velocity of a 1-kg particle moving along the x axis changes from vi = -2m/s to vf = -5m/s in 3s. (1) What are the change in momentum and impulse for vi = –2m/s and vf = –5m/s? (2) What is the average force acting in the 3s duration

At time t = 0s a 2-kg particle has a velocity of (4 m/s) � – (3 m/s) �. At t = 3 s its velocity is (2 m/s) � + (3 m/s) �. (1) What is the average force acting during the time interval between t=0s and t=3s? (2) What is the change of the kinetic energy of the particle in the same time interval? (3) What is the average power in the same time interval?

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genius_generous answered 1 year ago

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