Thursday

July 31, 2014

July 31, 2014

Posted by **Rajan** on Monday, July 30, 2012 at 1:49pm.

- Dynamics -
**Elena**, Monday, July 30, 2012 at 4:35pm1. The upward decelerated motion

v=vₒ-gt

At the top v=0

t=vₒ/g = 15/9.8=1.53 s.

h=vₒt-gt²/2.

h= vₒ²/2g=11.5 m.

2. Free fall from the height H+h = 30+11.5 = 41.5 m.

H=gt²/2 =>

t=sqrt(2•H/g) = sqrt(2•41.5/9.8)= 2.91 s.

v=gt =9.8•2.91=28.5 m/s.

Total time =1.53+2.91= 4.44 s.

**Related Questions**

Dynamics - A stone is thrown vertically upward from the top of a 30m high ...

Uniswa - A stone thrown from the top of a building which is 30m is given an ...

civil engineering - A stone (on the edge of the roof) thrown from the top of a ...

physics - A stone is thrown vertically upward with a speed of 15m/s.what is the ...

Physics - An objectis thrown upward from the edge of a tall building with a ...

physics - a stone is from the top of a tower 300m high and at the same time ...

physics - a stone is from the top of a tower 300m high and at the same time ...

PHYSICS - A stone is thrown in a vertically upward direction with a velocity of ...

physics - A stone with mass m = 2.3 kg is thrown vertically upward into the air ...

physics - A stone is dropped from a 75 m high building. when this stone has ...