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2 years ago

Hello:)! I don’t really understand the uniform deceleration too :/

Physics

1 answer:

NARA [144]2 years ago

4 0

Answer:

Deceleration is the opposite of acceleration.

The mathematical formula for deceleration is:

$Deceleration = \frac{Final velocity - Initial velocity}{Time taken}$

Uniform deceleration of an object can be defined as decreasing the velocity of an object in equal amount in an equal interval of time.

The graph attached below shows a constant decrease in the velocity with a uniform time interval.

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A car is traveling at an average speed of 70 m/s. How many km would the car travel in 6.5 hrs. ?

docker41 [41]

Answer:

<h2>38,769.23 miles</h2>

Explanation:

given:

A car is traveling at an average speed of 70 m/s.

find:

How many km would the car travel in 6.5 hrs. ?

solution:

distance = velocity over time

let velocity = 70 m/s

time = 6.5 hrs.

convert velocity 70 m/s into m/h for consistency of units.

<u>70 mi. </u> x <u>3600 sec.</u> = 252,000 mi/hour

sec. 1 hr.

now plugin values into the formula d = v/t

d = <u>252,000 miles/hour </u>

6.5 hours

d = 38,769.23 miles

therefore, the distance travelled in 6.5 hours with a speed of 70 m/s is 38,769.23 miles

5 0

2 years ago

What is the speed of the roller coaster at the top of the loop if the radius of curvature there is 11.0 m and the downward accel

8090 [49]

<span>When an object moves in a circle, the acceleration points toward the center of the circle. This acceleration is called centripetal acceleration. We can use a simple equation to find centripetal acceleration. a = v^2 / r We can use this same equation to find the speed of the car. v^2 = a * r v = sqrt { a * r } v = sqrt{ (1.50)(9.80 m/s^2)(11.0 m) } v = 12.7 m/s The speed of the roller coaster is 12.7 m/s</span>

3 0

2 years ago

In which type of bone does ossification occur in the membranes?

Afina-wow [57]

In the formation of flat bones such as the skull the mandibles and the clavicles

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2 years ago

A speed-time graph is shown below:

VladimirAG [237]

Answer: $0.5 m/s^{2}$

Explanation:

Average acceleration $a_{ave}$ is the variation of velocity $\Delta V$ over a specified period of time $\Delta t$ :

$a_{ave}=\frac{\Delta V}{\Delta t}}$

Where:

$\Delta V=V_{f}-V_{o}$ being $V_{o}=0 cm/s$ the initial velocity and $V_{f}=4 cm/s$ the final velocity (according to the information given from the described graph)