What is the velocity when the wrench strikes the ground answ

What is the velocity when the wrench strikes the ground? answer in units of m/s.

a worker drops a wrench from the top of a tower 85.9 m tall.

Solution

A particle moving along the x axis is located at 17.2 m at 1.79s and at 4.48 m at 4.28 s.

The velocity is defined as the rate of change of displacement per unit of time, in otherwords, the displacement / time gives the average velocity.

The displacement along the x axis = final postion-initial postion =4.48m-17.2m=-12.72m

The time taken for the above displacement =4.28s-1.79s=2.69s

Thereore, the average vlocity = -12.72/2.69= -4.7286m/s, the - minus sign indicates the velocity is in the direction of the origin.