What is the correct unit of work expressed in SI units? You throw a ball straigh

Question

What is the correct unit of work expressed in SI units? You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down. Car j moves twice as fast as car K, and car J has half the mass of car K. The kinetic energy of car J, compared to car K is An arrow of mass 20 g is shot horizontally into a bale of hay, striking the hay with a velocity of 60 m/s. It penetrates a depth of 20 cm before stopping. What is the average stopping force acting on the arrow? A ball drops some distance and gains 30 j of kinetic energy. DO NOT ignore air resistance. How much gravitational potential energy did the ball lose?

Explanation / Answer

1) B

2) C

3) B

4) C

5) B

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