Homework Statement
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A tennis player strikes an incoming tennis ball of mass m and speed v such that the ball leaves the racket at speed v as well. How much work was done by the tennis player to reverse the direction of the ball? Explain. Did the tennis player do any negative work?
Homework...
That is a great observation, but it's more of a signature of mine rather than representing the number 5. Unfortunately the username Chris is taken already haha.
When the elevator is in free fall, one will experience weightlessness. With that said, if the the elevator is accelerating downward at a fraction of g, one's apparent weight will be less than his/her true weight. With your tip, I see where I went wrong and contact force between the 30kg and 40kg...
Homework Statement
Four blocks of masses 20kg, 30kg, 40kg, and 50kg are stacked on top of one another in an elevator in order of decreasing mass with the lightest mass on the top of the stack. The elevator moves downward with an acceleration of ##3.2m/s^2## . Find the contact force between the...
Hi everybody!
As my username suggests, my name is Chris. I am a currently completing my undergrad in physics with a minor in computer science. I have browsed through Physics forums in the past and finally made that leap of faith and decided to create an account and be a part of this community...