Kinematics - Constant-Acceleration Motion
Kinematics - Constant-Acceleration Motion
TGM Original Questions
A ball is dropped from the top of a building. It takes \(7\) seconds to reach the ground.
- How high is the building?
- What is the velocity when it reaches the ground?
Hint: We know from Physics that the value of gravitational acceleration \(g\) is \(9.81ms^{-2}\).
Neglect air resistance and use constant gravitational acceleration \(g=9.81\text{ m/s}^2\). The ball is released from rest.
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Answer:(a) \(240.345\text{ m}\) (approximately \(240\text{ m}\)); (b) \(68.67\text{ m s}^{-1}\) downwards
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