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4 years ago

4

Physics

1 answer:

Svetlanka [38]4 years ago

6 0

Answer:

Speed of wave = 2.5 m/s

Explanation:

Given:

Time taken by wave = 6 second

Height (Distance) of wave = 15 meter

Find:

Speed of wave

Computation:

⇒ Speed = Distance / Time taken

⇒ Speed of wave = Height (Distance) of wave / Time taken by wave

⇒ Speed of wave = 15 / 6

Speed of wave = 2.5 m/s

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A cable is lifting a construction worker and a crate, as the drawing shows. The weights of the worker and crate are 965 N and 15

Alex777 [14]

Answer:(a)2631.46 N

(b)1605.51 N

Explanation:

Assuming there is a cable between crate and worker

Given

weight of worker $W_w=965 N$

Weight of crate $W_c=1510 N$

mass of worker $m_w=\frac{965}{g}=98.46 kg$

mass of crate $m_c=\frac{1510}{g}=154.08 kg$

acceleration of system $a=0.620 m/s^2$

Tension in the wire carrying Worker

$T-(m_w+m_c)g=(m_w+m_c)a$

$T=(m_w+m_c)(g+a)$

$T=(252.54)(9.8+0.62)$

$T=2631.46 N$

(b)Tension in the string above

$T_2-m_c\cdot=m_ca$

$T_2=m_c(g+a)$

$T_2=154.08(9.8+0.62)$

$T_2=1605.51 N$

4 0

3 years ago

(a) On the axes below, sketch the graphs of the horizontal and vertical components of the sphere’s velocity as a function of tim

jeka94

Answer:

Two identical spheres are released from a device at time t = 0 from the same ... Sphere A has no initial velocity and falls straight down. ... (b) On the axes below, sketch and label a graph of the horizontal component of the velocity of sphere A and of sphere B as a function of time. ... Which ball has the greater vertical velocity

Explanation:

4 0

3 years ago

A hunter on level ground fires a bullet at an angle of 2 degrees below the horizontal while simultaneously dropping another bull

Marizza181 [45]

If hunter fires a bullet 2 degree below the horizontal

then the components of its speed is given as

$v_x = v_o cos2$

$v_y = v_o sin2$

so here initial speed of the bullet is not zero but have some magnitude in downwards direction

While the other bullet is dropped downwards so its initial speed will be zero

So here we can say

$d = v_i*t + \frac{1}{2} at^2$

so if we use above equation we will find that the bullet that is shot at 2 degree below the horizontal will reach the ground first as its speed is more

3 0

3 years ago

You walk towards Starbucks southward for 14 meters and then west for 9 meters. The trip takes you 3 minutes to walk there. What

zimovet [89]

Although you walked (14+9)= 23 meters of distance, you ended up only 16.64 meters from where you started. That's your "displacement".

Velocity = (displacement / (time)

Velocity = (16.64m)/(180s)

Velocity = 0.0925 m/s roughly Southwest.

(That's about 3.6 INCHES per second. Apparently, you really NEED that mocha java and it's associated drug.)

8 0

3 years ago

A 3.0-kilogram cart possesses 96 joules of kinetic<br> energy. Calculate the speed of the car.

Dvinal [7]

Answer:

8.0 m/s

Explanation:

KE = ½ mv²

96 J = ½ (3.0 kg) v²

v = 8.0 m/s

5 0

4 years ago