- #1
robax25
- 238
- 3
- Homework Statement
- A screw inside a lift falls down when the lift moves upward at an acceleration of 4m/s². find out the time is taken by screw to fall down. It is 0.659s by calculation.Now the lift has initial velocity is 16m/s. Find out the impact velocity.
- Relevant Equations
- v=v0 +at (for lift)
v=v0-at(for screw)
v=16m/s+4*.659s=18.636m/s (for lift)
v0=16m/s-9.81*.659s=9.53m/s
my question is that why 16m/s is considered for screw velocity ? it is given for lift .what does it mean 9.53m/s? If you drop something , it gets acceleration and I calculate it 6.45m for screw while falling and why should I deduct from v0 to get result impact velocity for screw?
v0=16m/s-9.81*.659s=9.53m/s
my question is that why 16m/s is considered for screw velocity ? it is given for lift .what does it mean 9.53m/s? If you drop something , it gets acceleration and I calculate it 6.45m for screw while falling and why should I deduct from v0 to get result impact velocity for screw?