A stone of mass 0.7kg is projected vertically upwards with a speed of 5m/s. Calculate the maximum height reached

 Physics Jamb, Waec, Neco Past Questions & Answers on Speed, Velocity and Acceleration

QUESTIONS 33. A stone of mass 0.7kg is projected vertically upwards with a speed of 5m/s. Calculate the maximum height reached. [Take g as 10ms'² and neglect air resistance) 

NECO 2005 Ans:1.25m 

SOLUTIONS 

mass m =0.7kg

final velocity v= 5m/s²

Initial velocity u= 0

height h =?

acceleration due to gravity g = 10m/s²

Using v² = u²+ 2gh

5² = 0² + 2(10)h

25 = 20h

h = 25/20

h = 1.25m