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3 years ago

Francine applies a force of 48 N to a container with a mass of 8 kg. What acceleration does she give this container?

Physics

1 answer:

adell [148]3 years ago

3 0

Explanation:

F=48N

M=8Kg

a=?

now,

F=Ma

or,

a=F/M

or,

a=48/8

or,

a=8 m/s^2 <u>ans</u>

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What type of reaction feels cold to the touch?

IRISSAK [1]

Answer:

Explanation:

An endothermic reaction absorbs heat, so it will be cold to touch.

8 0

3 years ago

A truck, initially at rest, rolls down a frictionless hill and attains a speed of 20 m/s at the bottom. To achieve a speed of 40

Crank

Answer:

To achieve the velocity of 40 m/sec height will become 4 times

Explanation:

We have given initially truck is at rest and attains a speed of 20 m/sec

Let the mass of the truck is m

At the top of the hill potential energy is mgh and kinetic energy is $\frac{1}{2}mv^2$

So total energy at the top of the hill $=mgh+0=mgh$

At the bottom of the hill kinetic energy is equal to $\frac{1}{2}mv^2$ and potential energy will be 0

So total energy at the bottom of the hill is equal to $0+\frac{1}{2}mv^2$

Form energy conservation $mgh=\frac{1}{2}mv^2$

$v=\sqrt{2gh}$ , for v = 20 m/sec

$20=\sqrt{2\times 9.8\times h}$

Squaring both side

$19.6h=400$

h = 20.408 m

Now if velocity is 0 m/sec

$40=\sqrt{2gh}$

$19.6h=1600$

h = 81.63 m

So we can see that to achieve the velocity of 40 m/sec height will become 4 times

5 0

3 years ago

An electric force exists between which pair of objects? Check all that apply.

Blababa [14]

An electric force exists between the following:

-Two negative objects

-Two positive objects

-A negative object and a positive object

4 0

3 years ago

Throw a rock horizontally at 22 m/s from a 315 m tall building. How far from the base of the building will it land?

creativ13 [48]

Answer:

176.44 m

Explanation:

y = (vertical vi)t + (1/2)gt^2

315 = 0 + (1/2)(9.8)t^2

t = 8.02s

x = (horizontal vi)t + (1/2)at^2

x = (22)(8.02) + 0

x = 176.44 m

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3 years ago

Does anybody know to solve this?

Anna [14]

Answer:

25600 cm

2.56 x 10⁴ cm

Explanation:

Step 1: Find conversion

There are 100 cm in 1 m.

Step 2: Set up dimensional analysis

$256m(\frac{100cm}{1 m} )$

Step 3: Multiply and cancel out units

25600 cm

2.56 x 10⁴ cm

4 0

4 years ago