A paricle P is projected vertically upwards from a point A with speed 21ms^-1. the point A is 17.5m above horizontal ground. the particale P moves freely under gravity until it reaches the ground with a speed of 28ms^-1. After time t seconds after projection, P is 19m above A Find the possible values of t.
A paricle P is projected vertically upwards from a point A with speed 21ms^-1. the point A is 17.5m above horizontal ground. the particale P moves freely under gravity until it reaches the ground with a speed of 28ms^-1. After time t seconds after projection, P is 19m above A Find the possible values of t.
A paricle P is projected vertically upwards from a point A with speed 21ms^-1. the point A is 17.5m above horizontal ground. the particale P moves freely under gravity until it reaches the ground with a speed of 28ms^-1. After time t seconds after projection, P is 19m above A Find the possible values of t.
How far have you got?
Draw a sketch of the motion and choose a direction to be +ve [either up or down].