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Dafna11 [192]
3 years ago
13

You launch a water balloon from the ground with a speed of 8.3 m/s at an angle of 27°. a. What is the horizontal component of th

e velocity? (1 point) b. What is the vertical component of the velocity? (1 point) c. How long does it take the water balloon to reach its highest point? (1 point) d. What is the maximum height of the water balloon? (1 point) e. What is the total amount of time that the water balloon is in the air? (1 point) f. How far does the water balloon land from where you launched it? (1 point)
Physics
1 answer:
solmaris [256]3 years ago
7 0

a) The horizontal component of the velocity is 7.4 m/s

b) The vertical component of the velocity is 3.8 m/s

c) The balloon reaches the highest point after 0.39 s

d) The maximum height is 0.74 m

e) The total time of flight is 0.78 s

f) The range of the balloon is 5.77 m

Explanation:

a)

The motion of the balloon is the motion of a projectile, which consists of two independent motions:

- A uniform motion (constant velocity) along the horizontal direction

- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction

The horizontal component of the velocity (which is constant) is given by

v_x = u cos \theta

where

u = 8.3 m/s is the initial velocity of the balloon

\theta=27^{\circ} is the angle of projection

Substituting,

v_x = (8.3)(cos 27^{\circ})=7.4 m/s

b)

The vertical component of the initial velocity of a projectile is given by

u_y = u sin \theta

where

u is the initial velocity

\theta is the angle of projection

Here we have

u = 8.3 m/s

\theta=27^{\circ}

Substituting,

u_y = (8.3)(sin 27^{\circ})=3.8 m/s

c)

The vertical component of the velocity of the balloon follows the suvat equation

v_y = u_y - gt

where

v_y is the vertical velocity at time t

u_y = 3.8 m/s is the initial vertical velocity

g=9.8 m/s^2 is the acceleration of gravity

The balloon reaches the maximum height when the vertical velocity becomes zero:

v_y = 0

So we get:

0=u_y -gt\\t=\frac{u_y}{g}=\frac{3.8}{9.8}=0.39 s

d)

The maximum height of the balloon can be calculated using the suvat equation:

s=u_y t - \frac{1}{2}gt^2

where

u_y = 3.8 m/s is the initial vertical velocity

g=9.8 m/s^2 is the acceleration of gravity

t = 0.39 s is the time at which the highest point is reached

Substituting,

s=(3.8)(0.39)-\frac{1}{2}(9.8)(0.39)^2=0.74 m

e)

The total time of flight of a projectile is twice the time needed to reach the maximum height, and it is given by

t=\frac{2u_y}{g}

where

u_y is the initial vertical velocity

g is the acceleration of gravity

Here we have

u_y = 3.8 m/s

g=9.8 m/s^2

Substituting,

t=\frac{2(3.8)}{9.8}=0.78 s

f)

The range of a projectile is the horizontal distance covered by the projectile, so it can be found by multiplying its horizontal velocity (which is constant) by the time of flight:

d=v_x t

where

v_x is the horizontal velocity

t is the time of flight

Here we have

v_x = 7.4 m/s

t = 0.78 s

Substituting,

d=(7.4)(0.78)=5.77 m

Learn more about projectile motion:

brainly.com/question/8751410

#LearnwithBrainly

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