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3 years ago

a turtle accelerates from a stop at 3m/s squared to the south for 8s what is the turtles final velocity

1 answer:

6 0

He's accelerating at 3 m/s² .

That means his speed is increasing by 3 m/s every second.

At the end of 8 seconds, his speed is (8 x 3 m/s) = 24 m/s .

He's been moving south for the whole 8 seconds.
So at the end of that time, his velocity is

24 m/s south .

You might be interested in

Can an object have a positive position, but a negative velocity? Explain your reasoning.

photoshop1234 [79]

Answer:

Yes

Explanation:

A position describes the position of an object relative to the x/y-axis (or the four cardinal directions). A velocity is a vector quantity, defining speed with direction.

So if an object is in a positive position, it means they are in the positive x-axis direction (or wherever on the scale the positive values are stated to be) and if it has a negative velocity, it means said object is moving in the opposite direction of the positive x-axis. It is possible for the object to still be in the positive position as it's moving with a negative velocity

4 0

3 years ago

Two molecules of lithium are combined with 225 grams of bromine to form two molecules of lithium bromide. If you end up with 690

4vir4ik [10]

The amount of Li present to start the reaction is 55.18g

<u>Explanation:</u>

2Li + Br₂ → 2LiBr

Molecular weight of Br₂ = 159.808 g/mol

Mass of Br₂ present = 225 g

Moles of Br₂ present during the reaction = 225 / 159.808

m = 1.4

Molecular weight of LiBr = 86.845 g/mol

Mass of LiBr formed = 690 g

moles of LiBr produced = 690 / 86.845

m(LiBr) = 7.95

According to the balanced equation, 2 molecules of Li reacts to for 2 molecule of LiBr

So, 7.95 moles of LiBr would require 7.95 moles of Li

The molecular weight of Li is 6.941 g/mol

Thus, the amount of lithium present to start the reaction is

$moles = \frac{given weight}{molecular weight} \\\\7.95 = \frac{w}{6.941} \\\\w = 55.18g$

Therefore, the amount of Li present to start the reaction is 55.18g

6 0

3 years ago

Suppose an automobile has 2000 J of kinetic energy. When it moves at twice the speed, what will be its kinetic energy?

Varvara68 [4.7K]

The answer should be 8000 J

8 0

4 years ago

5. Calculate how long in seconds it will take for a light pulse to travel from earth to the moon. The distance from earth to moo

solniwko [45]

Answer:

0.13 seconds

Explanation:

Since 1 Km = 0.621 miles

3.84 x 105 km = 3.84 x 105 × 0.621 = 23846.4 miles

Speed = distance/time

time= distance/speed

Time= 23846.4/186,000

Time= 0.13 seconds

3 0

3 years ago

What is your average velocity after going 15 meters east followed by 20 meters

adelina 88 [10]

Answer:

0.5 m/s

Explanation:

Velocity = displacement/time taken

going 15 meters east and then 20 meters west gives a displacement of 5 meters.

Velocity v = 5/10

= 0.5 m/s

7 0

3 years ago