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4 years ago

Calculate the acceleration using the formula acceleration = (final velocity - initial velocity)/time

Physics

1 answer:

kari74 [83]4 years ago

4 0

Explanation:

Acceleration is defined as the rate of change of velocity with time. In most acceleration problems:

the given parameters will be;

Initial velocity

final velocity

time.

Using the equation below:

Acceleration = $\frac{Final velocity - initial velocity}{time}$

one can solve for acceleration. The unit is usually in m/s²

Learn more:

velocity brainly.com/question/10962624

#learnwithBrainly

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A skier with a mass of 63 kg starts from rest and skis down an icy (frictionless) slope that has a length of 50 m at an angleof

victus00 [196]

Answer:

Explanation:

When the skier reaches the bottom of the slope , height lost by it

h = 50 sin32 m

= 26.5 m

potential energy lost

= mgh

Gain of kinetic energy

= 1/2 mv²

mgh = 1/2 mv²

v = √ 2gh

= √ (2x9.8 x 26.5)

= 22.8 m /s

b )

Let μ be the coefficient of kinetic friction required.

friction force acting

= μmg

work done by friction in displacement of d (40 m ) on horizontal surface

- μmg x d

This negative work will be equal to positive kinetic energy of the skier on horizontal surface .

= μmg x d = (1/2) m v²

μ = v² / (2 gd)

= 519.4 / (2 x 9.8 x 140 )

= .19

8 0

4 years ago

An elevator accelerates upward at 1.2 m/s 2 . the acceleration of gravity is 9.8 m/s 2 . what is the upward force exerted by the

Marysya12 [62]

We can find the force by using the following formula;
N = ma + mg
Fa = ma = 76 x 1.2 = 91.2
Fg = mg = 76 x 9.8 = 744.8
N = 91.2 + 744.8 = 836
So, the force is 836 N.

8 0

4 years ago

Two wheels have the same mass and radius of 4.1 kg and 0.37 m, respectively. one has (a) the shape of a hoop and the other (b) t

snow_lady [41]

<span>Since the wheel start from rest. angular acceleration, Î¸=1/2Î±tÂ˛ 14=1/2Î± x 8.7Â˛ Î±= 0.3699 rad/sÂ˛ moment of inertia of loop= mrÂ˛= 4.1x0.37=1.517 kgmÂ˛ torque=T= lÎ± T= 0.5611Nm= 0.56Nm to significant figure Disc moment of inertia of disc= 1/2mrÂ˛ Required torque value= 0.28Nm So, I= 1/2X 4.1X 0.37Â˛= 0.280 KgmÂ˛ T= IÎ± = 0.280 X 0.3699= 0.10 to two significant figure</span>

3 0

3 years ago

Where is the density of the material greater, at point B or point C?<br> Explain why.

DerKrebs [107]

Answer: The density is greater at point C

Explanation: At that point

The convention current slowly cools off

8 0

4 years ago

What is the density of a substance of volume 3 m3and mass 9 kg?

butalik [34]

Answer:

Density = 3 kg/m³

Explanation:

Given the following data;

Volume = 3m³

Mass = 9 kg

To find the density;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the formula;

$Density = \frac{mass}{volume}$

Substituting into the formula, we have;

$Density = \frac{9}{3}$

Density = 3 kg/m³

7 0

3 years ago