a cannonball is fired with a speed of 76 m/s from the top of a cliff. It strikes the plane below with a speed of 89 m/s. if we neglect air friction, how high is the cliff
a cannonball is fired with a speed of 76 m/s from the top of a cliff. It strikes the plane below with a speed of 89 m/s. if we neglect air friction, how high is the cliff
Answer:
we use the formula,
[tex]v {}^{2} = u {}^{2} + 2gh[/tex]
[tex]89 {}^{2} = 76 {}^{2} + 2(10)h[/tex]
[tex]h = (89 {}^{2} – 76 {}^{2} ) \div 20[/tex]
h= 107 m