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WINSTONCH [101]
3 years ago
15

A light string is wrapped around the edge of the smaller disk, and a 1.50 kgkg block is suspended from the free end of the strin

g. If the block is released from rest at a distance of 2.40 mm above the floor, what is its speed just before it strikes the floor
Physics
1 answer:
Mandarinka [93]3 years ago
6 0

Answer:

The speed of the block before it strikes the floor is 0.217 m/s.

Explanation:

Given;

mass of the block, m = 1.5 kg

height above the ground through the block was released, h = 2.4 mm = 2.4 x 10⁻³ m

The speed of the block before it strikes the floor will be maximum.

Let the speed of the block before it strikes the floor = v

Apply the principle of conservation of mechanical energy to determine the speed of the block.

K.E = P.E

¹/₂mv² = mgh

¹/₂v² = gh

v² = 2gh

v = √2gh

v = √(2 x 9.8 x 2.4 x 10⁻³)

v = 0.217 m/s

Therefore, the speed of the block before it strikes the floor is 0.217 m/s.

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Which statement is the best interpretation of the ray diagram shown?
n200080 [17]

Answer:

Explanation:

First off, this lens is concave. Second, the image is obviously smaller, and third, the only thing that is NOT obvious, is the fact that real images are always upside down and virtual images are always right-side-up. So the choice you're looking for is D.

6 0
3 years ago
Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn't dry. Then he puts the glue
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4 0
3 years ago
A thin aluminum rod lies along the x-axis and has current of I = 16.0 A running through it in the +x-direction. The rod is in th
coldgirl [10]

Answer:

a) The magnitude of the magnetic field = 7.1 mT

b) The direction of the magnetic field is the +z direction.

Explanation:

The force, F on a current carrying wire of current I, and length, L, that passes through a magnetic field B at an angle θ to the flow of current is given by

F = (B)(I)(L) sin θ

F/L = (B)(I) sin θ

For this question,

(F/L) = 0.113 N/m

B = ?

I = 16.0 A

θ = 90°

0.113 = B × 16 × sin 90°

B = 0.113/16 = 0.0071 T = 7.1 mT

b) The direction of the magnetic field will be found using the right hand rule.

The right hand rule uses the first three fingers on the right hand (the thumb, the pointing finger and the middle finger) and it predicts correctly that for current carrying wires, the thumb is in the direction the wire is pushed (direction of the force; -y direction), the pointing finger is in the direction the current is flowing (+x direction), and the middle finger is in the direction of the magnetic field (hence, +z direction).

3 0
4 years ago
A copper sphere was moving at 25 m/s when it hit another object. this caused all of the ke to be converted into thermal energy f
muminat

ΔT= 81°C  was the increase in temperature.

<h3>steps</h3>

As evidenced by energy conservation

To increase its temperature, all of its kinetic energy will be converted to thermal energy.

\frac{1}{2}mv ^{2} = msΔT

then divide both sides by the object's mass.

\frac{1}{2} v^{2} =sΔT

therefore, a temperature shift is described as

ΔT= V^{2} /2s

ΔT= 25^{2}/ 2 x 387

ΔT= 81°C

ΔT= 81°C  was the increase in temperature.

learn more about increase in temperature here

<u>brainly.com/question/14319779</u>

#SPJ4

3 0
1 year ago
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