Calculating Projectile Motion and Speed: Vertical and Horizontal Components

In summary, the conversation is about determining the parameters of a projectile that is fired to clear an 80m obstacle. The first part involves calculating the vertical speed and time taken to reach maximum height, considering only the vertical motion. The second part involves finding the horizontal speed of the projectile, given a distance of 100m between points A and B. The final part involves finding the velocity and angle of projection. Equations such as Vvertical= vsinΘ may be used, and the vertical velocity at maximum height is zero.
  • #1
texmex
4
0
A projectile is to be fired so that it just clears an obstacle 80m high at its maximum height.
http://img167.imageshack.us/img167/5729/physicszh7.jpg
a) by considering the vertical motion only, calculate the verticle speedand the time taken to reach its maximum height
b) if the distance between A to B is 100m, calculate the horizontal speed with which the ball was thrown.
c) Hence find v and Θ.


totally stuck at this, any help much appricated.
 
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  • #2
Have you tried anything? What equations might be used? What can you say about the vertical component of the velocity at maximum height?
 
  • #3
the farthest i got, was putting in the right angle, and as for equations that could be used, i think it may have something to do with - Vvertical= vsinΘ. not entirely sure though.
 
  • #4
That would be the initial vertical velocity (is that a negative sign?). What is the vertical velocity at the instant of maximum height?
 

1. What is projectile motion?

Projectile motion is the motion of an object through the air or space under the influence of gravity. It follows a curved path known as a parabola.

2. What factors affect the speed of a projectile?

The speed of a projectile is affected by its initial velocity, the angle at which it is launched, and the force of gravity acting on it.

3. How is the velocity of a projectile calculated?

The velocity of a projectile can be calculated using the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity, and t is the time taken.

4. What is the difference between speed and velocity in projectile motion?

Speed refers to the rate at which an object is moving, while velocity takes into account the direction of motion. In projectile motion, speed remains constant while velocity changes due to the change in direction.

5. How does air resistance affect projectile motion?

Air resistance can slow down the speed of a projectile and alter its trajectory. In some cases, it can also cause the projectile to spin, leading to unpredictable motion.

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