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5 Cards in this Set
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Pellet of mass 8.8 g hits stationary block of 450g and causes it to rise 0.63m. Work out velocity of pellet. |
1. Work out energy gained; mgh (pellet + block) 2. Equate energy gained to KE of block + pellet; mgh = 1/2 mv^2; work out v 3. Mom. Lost pellet = mom. gain block; V x m(pellet + block) = m(pellet) x v 4. Substitute and work out V of pellet |
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Conservation of momentum cases |
Mom. Before collision = mom. After Mom lost by pellet = mom gain by block |
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Impulse is a vector or scalar |
SCALAR (CANNOT BE NEGITIVE) |
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If projectile is fired into the air, and subsequently hits ground, is acceleration ever zero. |
Acceleration will only flip between -9.81 and 9.81 |
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What is impulse? Difference between impulse and Force |
The change in momentum (regardless of time) Force is equal to the rate of change of momentum or impulse per unit time |