Sunday

November 23, 2014

November 23, 2014

Posted by **sandhya** on Tuesday, May 1, 2012 at 5:49am.

a)how long is the ball in the air

b)how far from the base of the house does it land?

c)what is its speed just before landing?

- physics -
**Elena**, Tuesday, May 1, 2012 at 8:09amv(ox) = v•cosα =5•cos30 = 4.33 m/s,

v(x) = v(ox) = 4.33 m/s,

v(oy) = v•sinα =5•sin30 = 2.5m/s.

h =v(oy) •t+g•t^2/2,

4.9•t^2 +2.5•t-7 =0

t = 1.05 s.

L =v(ox) •t = 4.33•1.05 = 4.55 m

v(y) = v(oy) + g•t = 2.5 +9.8•1.05 = 12.8 m/s,

v=sqrt{v(x)^2 + v(y)^2} = 13.5 m/s.

**Answer this Question**

**Related Questions**

physics - A ball rolls with a speed of 6.4 m/s toward the edge of a table that ...

physics - A ball of radius 0.211 m rolls along a horizontal table top with a ...

physics - A ball of radius 0.2m rolls along a horizontal table top with a ...

Physics - A ball of radius 0.300 m rolls along a horizontal table top with a ...

physics - In the figure below, a solid cylinder of radius 12 cm and mass 11 kg ...

Physics - A target lies flat on the ground 3m from the side of a building which ...

Physics - A ball rolls down a 1.00 m long and 0.40 m inclined plane and falls ...

Physics - Modern bowling alleys have automatic ball returns. The ball is lifted ...

Physics - A golf ball rolls off a horizontal cliff with an initial speed of 12.2...

physics - A golf ball rolls off a horizontal cliff with an initial speed of 14.1...