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stiv31 [10]
3 years ago
8

d is at rest at the top of a 2 m high slope. The sled has a mass of 45 kg. The sled's potential energy is J?

Physics
2 answers:
Anna71 [15]3 years ago
5 0
<span>D is at rest at the top of a 2 m high slope. The sled has a mass of 45 kg. The sled's potential energy is J?
</span>Answer: The sled's potential energy is 882 Joules
Lesechka [4]3 years ago
4 0

Answer:

882 J

Explanation:

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jasenka [17]

Answer:

thxs ace

Explanation:

6 0
3 years ago
Read 2 more answers
A spring 1.50 m long with force constant 448 N/m is hung from the ceiling of an elevator, and a block of mass 10.9 kg is attache
GuDViN [60]

Answer:

Explanation:

Let the extension in the spring be x .

restoring force = weight of block

kx = mg

x = \frac{10.9\times9.8}{448}

= 23.84 cm

b )

When the elevator is going upwards

Restoring force = mg + ma

k x₁ = 10.9 ( 9.8 + 1.89 )

x₁ = 28.44 cm

( y coordinate will  be - ( 28.44 - 23.84 ) = - 4.6 cm )

c ) When the cable snaps , both elevator and block undergo free fall . In this case apparent g = 0

Since the spring is stretched by 28.44 cm , a restoring force continues to act on the block which is equal to

.2844 x 448

= 127.41 N

So a net acceleration a will act on the block

a = 127.41 / 10.9

= 11.68 m / s²

The block will undergo SHM with amplitude equal to 28.44 cm .

3 0
3 years ago
If the specific gravity of copper is 8.91, it weighs:
denis-greek [22]

Answer:

Option D is the correct answer.

Explanation:

The specific gravity of copper is 8.91.

We have

            \frac{\texttt{Density of copper}}{\texttt{Density of water}}=8.91\\\\\texttt{Density of copper}=8.91\times 1000kg/m^3=8910kg/m^3

We also have

           1 kg = 2.205 lb

            1 m = 3.28 ft

Substituting

            \texttt{Density of copper}=8910kg/m^3=\frac{8910\times 2.205}{3.28^3}=556.76lb/ft^3

Option D is the correct answer.

6 0
3 years ago
Tia needs to produce a solenoid that has an inductance of 2.07 μ H . She constructs the solenoid by uniformly winding 1.19 m of
Masteriza [31]

Answer:

l=0.068 m

Explanation:

given,

inductance of solenoid = 2.07 μ H

winding of the wire = 1.19 m

Using formula of inductance

L = \dfrac{\mu_0N^2A}{l}

L is the inductance

N is number of turns of the coil

μ₀ is permeability of free space

L is length of winding

N (2π r) = 1.19          

squaring both side

4π(N²(πr²))=1.19²    

N² A = 0.113            

now                              

2.07 \times 10^{-6}= \dfrac{4\pi\times 10^{-7}\times 0.113}{l}

l= \dfrac{4\pi\times 10^{-7}\times 0.113}{2.07 \times 10^{-6}}

l=0.068 m

5 0
3 years ago
Two closed containers look the same but when is packed with LED and the other with a few feathers how could you determine which
Rudik [331]
You would want to push both containers, first one and then the other,
with exactly the same strength of push. 

The one that takes off slower (with less acceleration from the same
net force) is the one with more mass.
3 0
3 years ago
Read 2 more answers
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