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A javelin thrower exerts a horizontal force of 300 N on a 3 kg javelin during...

A javelin thrower exerts a horizontal force of 300 N on a 3 kg javelin during the execution of a throw (assume vertical force is equal to 0 N). Over the course of the throw, his hand and the javelin move through a horizontal displacement of 2.0 m. If the javelin’s initial horizontal velocity is equal to 0 m/s, how would the gravitational potential energy change over the course of the throw?

a. Gravitational potential energy will increase

b. Gravitational potential energy will decrease

c. Gravitational potential energy will remain the same

d. The information cannot be determined from the information given

Using the information from the previous question, what will be the final velocity of the javelin at the moment of release?

a. 20 m/s

b. 16.7 m/s

c. 400 m/s

d. 6.0 m/s

show work please!!

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Answer #1

-20 nls. (a),ゾー

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