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3 years ago

6. An excited dog runs full-speed toward his owner who has just returned home from

Physics

1 answer:

mixas84 [53]3 years ago

4 0

Answer:

v = 8.65 m/s

Explanation:

Given that,

Distance covered by the doge, d = 45 m

Time taken, t = 5.2 s

We need to find its average speed. The total distance covered divided by the total time taken is called the average speed of an object. So,

$v=\dfrac{45\ m}{5.2\ s}\\\\=8.65\ m/s$

So, the average speed is 8.65 m/s.

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While traveling home at dusk, a motorcyclist gets on the highway and increases the combined mass (400 kg

alexdok [17]

The acceleration of one of those bugs is equal to 305mi/s.

<h3>Acceleration calculation</h3>

To calculate the insect's acceleration, the action and reaction force of the impact must be considered.

As the insect will hit the helmet, the force it hits is the same force it receives, so we can make the following expression:

$m_m \times a_m = m_b \times a_b$

$550 \times 0.0027 = 5 \times 10^{-3} \times a_b$

<em>Speed has been converted to miles per second</em>

$a_b = 305 mi/s$

So, the acceleration of one of those bugs is equal to 305mi/s.

Learn more about acceleration calculation: brainly.com/question/390784

8 0

2 years ago

A boy moves down a waterslide from a height of 10 meters. what is his velocity when he hits the water at the bottom of the slide

statuscvo [17]

The velocity of the boy when he hits the water at the bottom of the slide is 14 m/s.

<h3>Velocity of the boy at the bottom of the slide</h3>

The velocity of the boy when he hits the water at the bottom of the slide is calculated from the principle of conservation of energy.

K.E = P.E

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

h is height of the boy
g is acceleration due to gravity

v = √(2 x 9.8 x 10)

v = 14 m/s.

Thus, the velocity of the boy when he hits the water at the bottom of the slide is 14 m/s.

Learn more about velocity here: brainly.com/question/6504879

#SPJ1

5 0

2 years ago

Which of the following situations would cause the greatest decrease in the motion of molecules in a system

Yakvenalex [24]

At 0 Kelvin everything stops moving ( even electrons ), so you could try to decrease the system's temperature
0 Kelvin = -273 Celsius

3 0

3 years ago

A small ball with mass 2.50 kg is mounted on one end of a rod 0.750 m long and of negligible mass. The system rotates in a horiz

alina1380 [7]

Answer:

1.40625 kg-m^2

Explanation:

Supposing we have to calculate rotational moment of inertia

Given:

Mass of the ball m= 2.50 kg

Length of the rod, L= 0.78 m

The system rotates in a horizontal circle about the other end of the rod

The constant angular velocity of the system, ω= 5010 rev/min

The rotational inertia of system is equal to rotational inertia of the the ball about other end of the rod because the rod is mass-less

$I_{sys}= mL^2= 2.50\times 0.75^2$

=1.40625 kg-m^2

m= mass of the ball and L= length of the ball

3 0

3 years ago

During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 33.9 rad/s. Find the angular displ

Mrac [35]

Answer:

the angular displacement Δθ of the tub during a spin of 92.1s is 3122.19 rad or 496.91 rev

Explanation:

Given;

Angular velocity v = 33.9 rad/s

Time t = 92.1 s

Angular displacement d = angular velocity × time

d = vt

Substituting the given values;

d = 33.9 × 92.1 rad

d = 3122.19 rad

To revolutions;

revolution = radian/2π

d = 3122.19/2π rev

d = 496.91 rev

the angular displacement Δθ of the tub during a spin of 92.1s is 3122.19 rad or 496.91 rev

7 0

3 years ago