- #1
irish_bhoy08
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1. A man is working in a building when he drops a screwdriver from the top, mass 400 grams, from a height of 40metres. Assuming g = 10N/kg
a)If the screwdriver loses 95% of its kinetic energy as heat and sound when it hits the ground, what will be the height of its first bounce?
2. KE = 1/2 x m x v2
gpe = m X g x h
v= √2gh
3. I have worked out the kinetic energy at as it hits the ground, the GPE and the velocity but i have no idea how to figure out what the height of the first bounce would be. Any hint to put in the right direction would be fantastic
a)If the screwdriver loses 95% of its kinetic energy as heat and sound when it hits the ground, what will be the height of its first bounce?
2. KE = 1/2 x m x v2
gpe = m X g x h
v= √2gh
3. I have worked out the kinetic energy at as it hits the ground, the GPE and the velocity but i have no idea how to figure out what the height of the first bounce would be. Any hint to put in the right direction would be fantastic