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vlabodo [156]
3 years ago
14

An 8.30 kg crate is pushed with a 17.7 N force. How fast does it accelerate?

Physics
2 answers:
kramer3 years ago
4 0

Answer:

2.13m/s^2

Explanation:

Use equation:

Fnet=ma

If 17.7 is the netto force (Fnet) then you just substitute the values in and solve.

Note m is mass (kg) and a is acceleration (m/s^2)

katovenus [111]3 years ago
4 0
F=17.7N
m=8.30kg
a=?
F=ma
a=F/m
a=17.7/8.30 (m/s^2)
I’m too lazy to use a calculator so yea. Just divide 17.7 by 8.30 and add unites (m/s^2)
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Starting from rest, a 6.79 kg block slides 2.82 m down a rough 20.7 ◦ incline. The coefficient of kinetic friction between the b
Veronika [31]

Answer:

23.52092 J

Explanation:

m = Mass of block = 6.79 kg

s = Sliding distance = 2.82 m

\theta = Angle of slide = 20.7°

\mu = Coefficient of kinetic friction = 0.425

g = Acceleration due to gravity = 9.8 m/s²

Work done by the force of gravity is given by

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The work done by the force of gravity is 23.52092 J

8 0
3 years ago
A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the window is 7.5 m off the ground. T
slamgirl [31]

Answer:

u=14.48m/s

Explanation:

From the question we are told that:

Height of window h=2m

Height of window off the ground h_g=7.5m

Time to fall and drop t=1.3s

 

Generally the Newton's equation motion  is mathematically given by

 s=ut+\frac{1}{2}at^2

Where

h=ut+\frac{1}{2}at^2

2=u1.3-\frac{1}{2}*9.8*1.3^2

2=u1.3-8.281

u=7.91m/s^2  

Generally the Newton's equation motion  is mathematically given by

2as=v^2-u^2

Where

-2gh_g=v^2-u^2

-2*9.8*7.5=(7.91)^2-u^2

-147=62.5681-u^2

u=\sqrt{209.5681}

u=14.48m/s

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u=14.48m/s

8 0
3 years ago
What is the density of a roll of pennies containing 50 pennies?
ololo11 [35]

Answer:

Density is defined as:

Density = Mass/Volume

Now, density is an intensive property, this means that if you have 10 grams of a given material or 1000 grams of the same material, in both cases you will find the same density.

Then a roll of 50 pennies has the same density that a single penny.

The measures of a single penny are:

Mass = 2.5 g

Thickness = 1.52 mm

Radius = 9.525 mm

The coin is a cylinder, and the volume of a cylinder is:

V = pi*r^2*h

where:

pi = 3.14

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The density will be:

D = 2.5g/433.015mm^3 = 0.00577 g/mm^3

4 0
3 years ago
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