Question

Example 10.2 A car falls off a ledge and
drops to the ground in 0.5 s. Let
g = 10 m s-2 (for simplifying the
calculations).
(i) What is its speed on striking the
ground?
(ii) What is its average speed during the
0.5 s?
(iii) How high is the ledge from the
ground

should v(final velocity) be 0 or u(initial velocity) be 0​

Answer 1

Answer:

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A ball P collides elastically with an another identical ball Q with velocity 10m/s at an angle of 30o from the line joining their centres c1 and c2. Select the correct alternative(s).