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3 years ago

PLEASE HELP!!!!!!!!

Physics

2 answers:

ivanzaharov [21]3 years ago

6 0

Answer:

the is D

Explanation:

An action-reaction force pair

lianna [129]3 years ago

3 0

Answer:

An action-reaction force pair

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3 years ago

You hold a bucket in one hand, and in the bucket is a 500 g rock. You swing the bucket so the rock moves in a vertical circle 2.

Blababa [14]

Answer:

3.28 m/s

Explanation:

From the question,

Applying newtons ,

F = mv²/r........................ Equation 1

Where m = mass of the rock, v = speed, r = radius of the circle, F = Centriputal force.

But,

Centriputal force is equal to the weight of the rock

F = mg................. Equation 2

Equate equation 2 into equation 1

mg = mv²/r

Therefore,

v = √gr...................... Equaion 3

Given: r = 2.2/2 = 1.1 m

Constant: g = 9.8 m/s²

Substitute into equation 3

v = √(9.8×1.1)

v = √(10.78)

v = 3.28 m/s

Hence the minimum speed is 3.28 m/s

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3 years ago

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3 years ago

the length of the sliding rod is 0.1 m and its speed is 2.0 m/ and b is 0.60 t. a) if the total resistance of the loop is 0.05 ,

Aleks [24]

The induced current produced due to moving sliding rod having resistance 0.05 is 2.4 A.

Induced current:

Any change in the magnetic field associated with a coil of wire will cause an emf to be induced in the coil. This emf is called induced emf and if the conductor circuit is closed, current will also circulate through the circuit. This current is called induced current.

Given, length of sliding rod, l= 0.1 m

Magnetic field = 0.60T

Velocity = 2m/s

Resistance of the loop = 0.05

Emf Induced = Blv

induced current = Blv/R

$i = \frac{0.6 \times 0.1 \times 2}{0.05}$