# Physics

An acrobat is launched from a cannon at an angle of 60 degrees above the horizontal. The acrobat is caught by a safety net mounted horizontally at the height from which he was initially launched. Suppose the acrobat is launched at a speed of 26 m/s

a) how long does it take before he reaches his maximum height?

b) How long does it take in total for him to reach a point halfway back down to the ground?

1. 👍 0
2. 👎 0
3. 👁 1,213
1. Vo = 26m/s[60o]
Yo = 26*sin60 = 22.5 m/s.

a. Y = Yo + g*Tr = 0 @ max. ht.
Tr = -Yo/g = -22.5/-9.8 = 2.30 s. = Rise
time.

b. h max = -(Yo^2)/2g = -(22.5)^2/-19.6 = 25.83 m.

h = 0.5g*t^2 = 25.83/2 = 12.91 m.
4.9t^2 = 12.91
t^2 = 2.64
Tf = 1.62 = Fall time.

Tr+Tf = 2.30 + 1.62 = 3.92 s. To fall
halfway back to gnd.

1. 👍 2
2. 👎 0

## Similar Questions

1. ### physics

10. A cannon elevated at an angle of 35º to the horizontal fires a cannonball, which travels the path shown in the diagram below. [Neglect air resistance and assume the ball lands at the same height above the ground from which it

2. ### Physics

which of the following is NOT true about the path of a cannon ball launched horizontally from the earth's surface if air resistance is neglected? a. the cannnonball has a uniform horizontal velocity b.the total velocity of the

3. ### Physics

HOW DO I DO THIS? A daredevil is shot out of a cannon at 45.0° to the horizontal with an initial speed of 28.0 m/s. A net is positioned a horizontal distance of 51.0 m from the cannon. At what height above the cannon should the

4. ### physics

At a circus, a human cannonball is shot from a cannon at 15m/s at an angle of 40 degrees from horizontal. She leaves the cannon 1m off the ground and lands on the way down in a net 2m off the ground. Determine her horizontal

1. ### Physics

A daredevil is shot out of a cannon at 45.0° to the horizontal with an initial speed of 28.0 m/s. A net is positioned a horizontal distance of 51.0 m from the cannon. At what height above the cannon should the net be placed in

2. ### physics

a projectile launched speed of 31.1m/s at angle 71.2 degrees above horizontal fill in table time 0 vx m/s 10.0m/s vy 29.4m/s ax? ay?

3. ### physics

A water balloon is fired at 34.0 m/s from a water cannon, which is aimed at an angle of 18° above the ground. The center of the cannon's target (which has a radius of 1.0 m) is painted on the asphalt 42.0 m away from the water

4. ### Physics

A cannon is fired from the ground at an angle of 30 degrees. It is being shot an an initial velocity of 200m/s. What is the maximum height of the cannon ball? How fat will the cannon ball travel before it hits the ground

1. ### algebra 2

A cannonball is launched from a cannon on a wall. If the path is traced on piece of paper so that the cannon is situated on the y axis, the equation of the path is y= -1/600x^2 + 1/2x + 20. How high above the ground is the cannon.

2. ### Physics

You are launching a 2-kg potato out of a potato cannon. The cannon is 1.5m long and is aimed 30 degrees above the horizontal. It exerts a 50N force on the potato. What is the kinetic energy of the potato as it leaves the muzzle of

3. ### Physics

A daredevil is shot out of a cannon at 54 degrees to the horizontal with an initial speed of 33.3 m/s. A net is positioned a horizontal distance of 41.8 m from the cannon. At what height above the cannon should the net be placed

4. ### Physics

a projectile is launched from a cliff 100m above level ground with a launch velocity angle of 20 degrees above the horizontal What is the horizontal displacement and time upon impact And the max height it traveled