Science need in 20 minutes taking a test Must SHow work

How much energy is required to bench press 110 kg a distance of 0.7 meters? What kind of energy does the barbell have while at rest at the top of this height? To receive full credit, show all of your work in the space below.

How much energy does a pitcher transfer to a 0.15 kg baseball while throwing it at a speed of 40 m/s? To receive full credit, show all of your work in the space below.

A commuter train leaves the Metro transit station at precisely 10:00 AM. You intend to board the same train at the next stop in Whistleville, located 14 miles away from the Metro transit station. The average speed of the commuter train is 35 mph. It takes you five minutes to walk from your apartment to the platform in Whistleville. What time should you leave the apartment in order to arrive at the platform at the same time as the train? Show all of your work in the space below to receive full credit.

 

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