Monday

April 21, 2014

April 21, 2014

Posted by **Tammy** on Wednesday, September 26, 2007 at 1:27pm.

a) determine the time necessary fot the projectile to reach the ground below

b) determine the horizontal distance from the base of teh building that the projectile lands

c) determine the horizontal and vertical components of the velocity just before the projectile hits the ground

d) determine the magnitude of the total velocity just before the projectile hits the ground.

a)would I use y=y_0 +v_0t +1/2 at^2

100=0+0+1/2(-10)t^2 and solve for t? when i did i got 4.47s

b) would i use x=x_0+v_xt

=0+30*4.47

=134.1m

c)for the horizontal componet i believe i use v=v_0 +at and for the vertical: x=x_0+vt

d) v_total =sqrt(vx^2 +vy^2)

Are these equations I came up with correct to solve this problem?

- Physics -
**bobpursley**, Wednesday, September 26, 2007 at 1:53pma) right equation.

b) right

c) NO. Horizontal velocity remains the same as initial (30m/s). The vertical velocity is -g*timeinair.

d)Right formula.

**Related Questions**

Physics - A projectile is shot horizontally at 30m/s from the roof of a building...

Physics - A projectile is shot horizontally at 30m/s from the roof of a building...

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

Physics - A projectile is fired from ground level with a speed of 40 m/s at an ...

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

Physics - A ball thrown horizontally at 18.3 m/s from the roof of a building ...

Physics - A projectile is shot from the edge of a cliff h = 225 m above ground ...

physics - At a time t after being projected from the ground, a projectile is ...

physics - A large building has an inclined roof. The length of the roof is 69.5 ...

physics - A ball thrown horizontally at 17.0 m/s from the roof of a building ...