A 1-kg ball in the air has an initial velocity vo = [ 10 ] i...
A 1-kg ball in the air has an initial velocity vo = [ 10 ] i + [ -20 ] j m/s. It falls for a total time of 1 s. Assume that positive x-values are to the right and positive y-values are upward.
What is the initial kinetic energy
Ki of the ball?
J
| Remember that the initial kinetic energy Ki = pi2/2m. To find the magnitude of the resultant momentum we must use the pythagorean theorem on the x and y components. This gives us a square root, which is then squared: Ki = (pxi2 + pyi2)/2m. |
| Incorrect. | Tries 1/2 | Previous Tries |
What is the final kinetic energy Kf of
the ball?
J
| Tries 0/2 |
What is the change in kinetic energy ∆K of the
ball?
J
| Tries 0/2 |
What is the ball's change in height ∆y after it falls 1 s?
Homework Answers
A 1-kg ball in the air has an initial velocity vo = [ -20 ] i...
A 1-kg ball in the air has an initial velocity vo = [ -20 ] i + [ -20 ] j m/s. It falls for a total time of 1 s. Assume that positive x-values are to the right and positive y-values are upward. What is the initial momentum pi of the ball? -20 i + -20 j kg*m/s What is the impulse or change in momentum ∆p of the ball? 0 i + -10 j kg*m/s What is the final momentum pf of the ball?...
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Block 1 (0.5 kg) travels with an Initial velocity of [ 40/1 601 m/s and then collides with block 2 (0.5 kg) travelling with an Inltial velocity of t-4011+I-401 1 m/s After the collision, block 1 has a final momentum of [ 51] + [ Qİ kg·m/s. Assume that no external forces are present and therefore the momentum for the system of blocks is conserved. What Is the Initial momentum of block 1? 1 + kg*m/s Setmit Ansee Tries 0/3...
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