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Troyanec [42]
3 years ago
11

PLEASE HELP

Physics
2 answers:
worty [1.4K]3 years ago
3 0

Explanation:

by momentum conservation

64× v=42×3.11

v=2.04m/s

ANTONII [103]3 years ago
3 0

Answer:last one is the answer

Explanation:hope it helps

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Two ice skaters push off against one another starting from a stationary position. The 54.1-kg skater acquires a speed of 0.375 m
asambeis [7]

Answer:

0.338125 m/s

Explanation:

Applying,

Law of conservation of momentum

m'v' = mv............ Equation 1

Where m' = mass of the first skater, v' = velocity of the first skater, m = mass of the second skater, v = velocity of the second skater.

make v the subject of the equation

v = m'v'/m........... Equation 2

From the question,

Given: m' = 54.1 kg, v' = 0.375 m/s, m = 60 kg

Substitute these values into equation

v = (54.1×0.375)/60

v = 20.2875/60

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3 years ago
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Karolina [17]
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A simple electric motor consists of a 220-turn coil, 4.4 cm in diameter, mounted between the poles of a magnet that produces a 9
Verdich [7]

Answer:

M = 5.01\ A.m^2          

Explanation:

It is given that,

Number of turns in the coil, N = 220

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Magnetic field produced by the poles of magnet, B=96\ mT=96\times 10^{-3}\ T

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Let M is the coil's magnetic dipole moment. Its formula is given by :

M=N\times I\times A

M=220\times 15\times \pi (0.022)^2

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So, the coil's magnetic dipole moment is 5.01\ A.m^2. Hence, this is the required solution.

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