# Engineering science N4

Calculate the angle of projection of a projectile in order to hit a target 12km away.the initial velocity is 700m/s ant the time of the flight is 80seconds.

1. 👍 0
2. 👎 0
3. 👁 112
1. Distance = Vo^2*sin(2A)/g = 12000 m
700^2*sin(2A)/9.8 = 12000
50000*sin(2A) = 12000
sin(2A) = 12000/50000 = 0.240
2A = 13.9o
A = 6.94o

1. 👍 0
2. 👎 0
posted by Henry

## Similar Questions

1. ### Sindhi

the velocity of a projectile at its highest point is 40 m/s.if the projectile was in air for 6 second before falling the ground calculate angle of projection of the projectile.

asked by Asif Khan on September 23, 2012
2. ### physics

A plane flying horizontally at 50 m/s is 2000m from its target. a)At what height must a projectile be released in order to strike the ground target. (neglect air resistance) b)At what velocity will the projectile strike the

asked by Matthew on September 11, 2011
3. ### physics

A projectile (mass = 0.269 kg) is fired at and embeds itself in a target (mass = 1.34 kg). (The target is initially stationary). The target (with the projectile in it) flies off after being struck. What percentage of the

asked by chris on October 16, 2008
4. ### precalculus

If a projectile is fired with velocity v0 at an angle θ, then its range, the horizontal distance it travels (in feet), is modeled by the function R(θ) = v02 sin 2θ 32 . If v0 = 2600 ft/s, what angle (in degrees) should be

asked by Ama on October 28, 2012
5. ### physics

A cannon sends a projectile towards a target a distance 1250 m away. The initial velocity makes an angle 40◦ with the horizontal. The target is hit. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the initial

asked by Wendia on September 20, 2010
6. ### Physical Science

A bullet is fired with an initial speed of 200 m/s. If a target is 500ft away, at what angle should the rifle be raised in order to hit the target?

asked by John on October 26, 2016
7. ### Physics

A bullet is fired with an initial speed of 200 m/s. If a target is 500ft away, at what angle should the rifle be raised in order to hit the target?

asked by John on October 26, 2016
8. ### Physics

A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b)

asked by Jacob on December 6, 2014
9. ### Physics

A projectile (mass = 0.10 kg) is fired at and embeds itself in a target (mass = 2.11 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the

asked by Lauren on February 22, 2011
10. ### Physics

I have a golf ballthat is hit for 0.20s at an angle to the horizontal and it hits the ground some distance away. Initial speed is 30m/s and angle of projection is 35. Calculate the time between when the ball was hit and when it

asked by Sam on October 7, 2010

More Similar Questions