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3 years ago

What are two parts that make up a vector

Physics

1 answer:

mojhsa [17]3 years ago

3 0

Answer:

Vectors have both magnitude and direction.

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When the kinetic energy of an object changes, energy is transferred to or from the object.

gtnhenbr [62]

That's a true statement ... not a question.

When the kinetic energy of an object changes, energy
may be transferred either to or from the object.

8 0

4 years ago

An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavie

leva [86]

To solve the problem it is necessary to apply conservation of the moment and conservation of energy.

By conservation of the moment we know that

$MV=mv$

Where

M=Heavier mass

V = Velocity of heavier mass

m = lighter mass

v = velocity of lighter mass

That equation in function of the velocity of heavier mass is

$V = \frac{mv}{M}$

Also we have that $m/M = 1/7 times$

On the other hand we have from law of conservation of energy that

$W_f = KE$

Where,

W_f = Work made by friction

KE = Kinetic Force

Applying this equation in heavier object.

$F_f*S = \frac{1}{2}MV^2$

$\mu M*g*S = \frac{1}{2}MV^2$

$\mu g*S = \frac{1}{2}( \frac{mv}{M})^2$

$\mu = \frac{1}{2} (\frac{1}{7}v)^2$

$\mu = \frac{1}{98}v^2$

$\mu = \frac{1}{g(98)(5.1)}v^2$

Here we can apply the law of conservation of energy for light mass, then

$\mu mgs = \frac{1}{2} mv^2$

Replacing the value of $\mu$

$\frac{1}{g(98)(5.1)}v^2 mgs = \frac{1}{2}mv^2$

Deleting constants,

$s= \frac{(98*5.1)}{2}$

$s = 249.9m$

7 0

4 years ago

Find the impulse a 1500 kg car experiences slowing down from 40m/s to 10m/s?

Kitty [74]

Answer: - 45000 N.s

Explanation: Impulse is equal to the change in momentum

J = Δp

To solve for impulse we calculate the change in momentum

Δp = m ( Δv)

= 1500 kg ( 10 m/s - 40 m/s)

= - 45000 N.s

6 0

4 years ago

If a small motor does 520 J of work to move a toy car 260 m, what force does the engine exert on the car?

ohaa [14]

Answer:

Explanation:

The force engine exert on the car can be found by using the formula

$f = \frac{w}{d} \\$

w is the workdone

d is the distance

From the question we have

$f = \frac{520}{260} = 2 \\$

We have the final answer as

Hope this helps you

4 0

3 years ago

A seed can be round when parents are crossed, scientists refer to the first generation of offspring as

lora16 [44]

Hey there!

A seed can be round when parents are crossed, scientists refer to the first generation of offspring as F1. <span> This is the first generation of seeds from very different parental types.</span><span>

</span>Thank you!

4 0

4 years ago