All categories

3 years ago

A pebble is thrown into the air with a velocity of 19/m at an angle of 36 with respect to the horizontal.

Physics

1 answer:

kow [346]3 years ago

3 0

Answer:

The maximum height the pebble reaches is approximately;

A. 6.4 m

Explanation:

The question is with regards to projectile motion of an object

The given parameters are;

The initial velocity of the pebble, u = 19 m/s

The angle the projectile path of the pebble makes with the horizontal, θ = 36°

The maximum height of a projectile, $h_{max}$ , is given by the following equation;

$h_{max} = \dfrac{\left (u \times sin(\theta) \right)^2}{2 \cdot g}$

Therefore, substituting the known values for the pebble, we have;

$h_{max} = \dfrac{\left (19 \times sin(36 ^{\circ}) \right)^2}{2 \times 9.8} = 6.3633894140470403035477570509439$

Therefore, the maximum height of the pebble projectile, $h_{max}$ ≈ 6.4 m.

You might be interested in

What is time taken by the stone ?

SSSSS [86.1K]

The time taken by the stone to hit the ground would be 5.12 seconds.

<h3>What are the three equations of motion?</h3>

There are three equations of motion given by Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

Keep in mind that these calculations only apply to uniform acceleration.

As given in the problem, a stone is dropped from the helicopter which is ascending at the speed of 19.6 m/s

height(S) = 156.8 meters

initial velocity(u) = -19.6 m/s

acceleration(a) = 9.81 m/s²

By using the second equation of motion given by newton

S = ut + 1/2at²

S = 156.8m ,u= -19.6 m/s , a= 9.81 m/s² and t =? seconds

156.8= -19.6t + 9.81t²

t = 5.12 seconds

Thus, the time taken by the stone to hit the ground would be 5.12 seconds.

Learn more about equations of motion from here,

brainly.com/question/5955789

#SPJ1

8 0

2 years ago

You have two springs that are identical except that spring 1 is stiffer than spring 2, (k1 > k2). On which spring is more wor

kicyunya [14]

Answer:

Explanation:

Given

Two springs with spring constant $k_1$ and $k_2$

(a)If they are stretched using the same force

Force $F=k_1x_1=k_2x_2$

where $x_1$ and $x_2$ are the extension in the spring

so $\frac{k_1}{k_2}=\frac{x_2}{x_1}$

therefore $x_2 > x_1$

Work done is given by

$W=F\cdot x$

$W_1=F\cdot x_1$

$W_2=F\cdot x_2$

thus $W_2 > W_1$

(b)If they are stretched the same distance

$\frac{F_1}{F_2}=\frac{k_1}{k_2}$

Thus $F_1 > F_2$

For same extension, work done by Force 1 is more

$W_1 > W_2$

6 0

4 years ago

A point charge is placed 100 m from a 6 µC charge generating an electric field. What is the strength of the electric field on th

allochka39001 [22]

Answer:

Explanation:

The answer is 5 on edge.

6 0

4 years ago

Read 2 more answers

Need help... 44 points!!!!

vladimir1956 [14]

As per conditions described here we know that all force arrow are not of equal length

So all forces are not same in magnitude

Here applied force on right direction is more in magnitude then the friction force on left

So it will have net unbalanced force towards right due to which it will move towards right direction or in the direction of net unbalanced force

While in the upward and downward direction the forces are balanced and hence the box will not move in that direction

So normal force will be balanced by gravitational force

So here answer will be

The forces acting on the box are <u>UNBALANCED</u> .

The box will move to the <u>RIGHT</u> .

7 0

4 years ago

Read 2 more answers

When bridges are built, special joints must be used because the material of the bridge shrinks, and without these joints, the ma

egoroff_w [7]

Answer:

Option D.

Explanation:

The correct answer is Option D.

The shrinkage of the bridge material is because of thermal contraction.

Thermal contraction and thermal expansion are the phenomena of the bridge material which takes place due to the change in temperature of the atmosphere.

When the temperature of the surrounding increases expansion of the bridge material takes place and when temperature decreases the contraction of the material takes place.

This phenomenon sometimes damages the structure because due to continuous expansion and contraction of materials strength of the bridge decreases.

8 0

4 years ago