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3 years ago

4. A football player has a mass of 75 kg, and he is running with a velocity of 18 m/s. What is his momentum? Answer:

Physics

1 answer:

irinina [24]3 years ago

8 0

Answer:

1350kgm/s

Explanation:

Given parameters:

Mass of footballer = 75kg

Velocity = 18m/s

Unknown:

Momentum = ?

Solution:

The momentum of a body is the quantity of motion it posses.

It is mathematically given as:

Momentum = mass x velocity

Momentum = 75 x 18

Momentum = 1350kgm/s

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3 years ago

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Andrews [41]

Answer:

Option D. 9.47 V

Explanation:

We'll begin by calculating the equivalent resistance of the circuit. This can be obtained as follow:

Resistor 1 (R₁) = 20 Ω

Resistor 2 (R₂) = 30 Ω

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Equivalent Resistance (R) =?

R = R₁ + R₂ + R₃ (series connections)

R = 20 + 30 + 45

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Next, we shall determine the current in the circuit. This can be obtained as follow:

Voltage (V) = 45 V

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Finally, we shall determine, the voltage across R₁. This can be obtained as follow:

NOTE: Since the resistors are in series connection, the same current will pass through them.

Current (I) = 0.4737 A

Resistor 1 (R₁) = 20 Ω

Voltage 1 (V₁) =?

V₁ = IR₁

V₁ = 0.4737 × 20

V₁ = 9.47 V

Therefore, the voltage across R₁ is 9.47 V.

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4. A football player has a mass of 75 kg, and he is running with a velocity of 18 m/s. What is his momentum? Answer:​

4. A football player has a mass of 75 kg, and he is running with a velocity of 18 m/s. What is his momentum? Answer: