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Novosadov [1.4K]
3 years ago
8

A small block of mass 1.57 kg rests on the left edge of a block of length 3.45 m and mass 7.04 kg. the coefficient of kinetic fr

iction between the two blocks is 0.307, and the surface on which the 7.04 kg block rests is frictionless. a constant horizontal force of magnitude 10.4 n is applied to the 1.57 kg block, setting it in motion. 3.45 m 10.4 n 7.04 kg 1.57 kg 1.57 kg 7.04 kg 10.4 n how long will it take before this block reaches the right side of the 7.04 kg block? the acceleration of gravity is 9.8 m/s 2 . (note that both blocks are set in motion when f~ is applied. answer in units of s. 002 (part 2 of 2) 10.0 points how far did the 7.04 kg block move in
Physics
1 answer:
MariettaO [177]3 years ago
3 0
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As an object moves from point A to point B only two forces act onit: one force is nonconservative and does -30 J of work, the ot
Romashka-Z-Leto [24]

To solve this problem we will apply the principles of energy conservation. On the one hand we have that the work done by the non-conservative force is equivalent to -30J while the work done by the conservative force is 50J.

This leads to the direct conclusion that the resulting energy is 20J.

The conservative force is linked to the movement caused by the sum of the two energies, therefore there is an increase in kinetic energy. The decrease in the mechanical energy of the system is directly due to the loss given by the non-conservative force, therefore there is a decrease in mechanical energy.

Therefore the correct answer is A. Kintetic energy increases and mechanical energy decreases.

7 0
3 years ago
Tell the difference between an internal and an external influence and give 1 examples of each.
Morgarella [4.7K]

Answer:

Si tienen diferencia

Explanation: Internas: Proviene de la herencia; el legado genético que las personas reciben de sus padres.

Externa: Provienen de las experiencias personales frente

al mundo exterior

3 0
3 years ago
a wire is carrying a 2.45 A current. at what distance from the wire is the magnetic field 1.00x10^-6t
balu736 [363]

Answer:

0.49m

Explanation:

So you need to change the original equation for finding fields to find distance, and then just plug in the numbers

Which equals 0.49meters

Also it was right on Acellus :)

Hope this helps

5 0
3 years ago
A certain piece of metal (density 9.45 grams per cubic centimeter) has the shape of a hockey puck with a diameter of 13 cm and a
atroni [7]

Answer:

0.0195 m

Explanation:

\rho _{p} = density of hockey puck = 9.45 gcm⁻³ = 9450 kgm³

d_{p} = diameter of hockey puck = 13 cm = 0.13 m

h_{p} = height of hockey puck = 2.8 cm = 0.028 m

\rho _{m} = density of mercury = 13.6 gcm⁻³ = 13600 kgm³

d = depth of puck below surface of mercury

According to Archimedes principle, the weight of puck is balanced by the weight of mercury displaced by puck

Weight of mercury displaced = Weight of puck

\rho _{m} (0.25)(\pi d_{p}^{2} d ) g = \rho _{p} (0.25)(\pi d_{p}^{2} h_{p} ) g\\\rho _{m} ( d ) = \rho _{p} ( h_{p} )\\(13600) d = (9450) (0.028)\\d = 0.0195 m

7 0
3 years ago
(PLEASE HELP. DUE IN 4 HOURS. I WILL CASHAPP YOU $20 TO GIVE A CORRECT ANSWER. PLEASE LEGIT ANSWERS. I AM DESPERATE. GIVING BRAI
netineya [11]

Answer:

When the mass is drawn upwards and let go, the force of gravity accelerates it,

Explanation:

if you send me the video i can give you a better answer its just hard without seeing it

5 0
3 years ago
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