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2 years ago

When the net force on an object is zero, what do we know about the motion of that object

Physics

1 answer:

aev [14]2 years ago

6 0

Answer:

The objects speed or motion does not change if the net force is 0.

Explanation: There basically doesn't have anything acting on it so it stays put.

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What happens as water evaporates from a lake

NARA [144]

Answer:

As that liquid water is further heated, it evaporates and becomes a gas—water vapor. So C... Need branliest pls

Explanation:

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2 years ago

A merry-go-round on a playground consists of a horizontal solid disk with a weight

bezimeni [28]

Answer:α = 1.00 rad/s², τ = 90.0 N•m, KEr = 1.12 kJ

Explanation:

m = 795/9.81 = 81.0 kg

ω₁ = 47.79 rev/min(2π rad/rev) / (60 s/min) = 5.00 rad/s

α = (ω₁ - ω₀)/τ = (5.00 - 0.00)/5.00 = 1.00 rad/s²

I = ½mR² = ½(81.0)(1.49²) = 90.0 kg•m²

τ = Iα = 90.0(1.00) = 90.0 N•m

KEr = ½Iω² = ½(90.0)5.00² = 1,124.477 ≈ 1.12 kJ

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2 years ago

If the speed of an object is tripled, its kinetic energy will be

Savatey [412]

Answer:

if the speed of the object triples the kinetic energy becomes nine times the initial kinetic energy. If the speed of an object changes by a factor k, the change in the kinetic energy is of a factor k^2.

Explanation:

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3 years ago

Read 2 more answers

Current can also be called

muminat

Electrical current is the flow of moving charges.

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2 years ago

Read 2 more answers

Two people of different masses sit on a seesaw. M1, the mass of person 1, is 91 kg, M2 is 45 kg, d1 = 0.8 m, and d2 = 1.1 m. The

mash [69]

Answer:

1/ 485.6 Nm

2/ Clock-wise

3/ 0 and no direction

4/ 1.62 m

Explanation:

1/ Torque is gravity force times the moment arm. Let's g = 9.81m/s2

$T_2 = m_2*g*d_2 = 45*9.81*1.1 = 485.6 Nm$

2/ If person 2 is sitting on the right, the direction of this torque is clock-wise, since the gravity is acting downward.

3/ Assuming that location A is right at the pivot point, then the torque generated by this torque is 0, since the moment arm is 0. This has no direction.

4/ The seasaw is balanced, this means torques generated by 2 people are equal and in opposite direction

$T_1 = T_2$

$m_1gd_1 = m_2g_d_2$

$m_1d_1 = m_2d_2$

$d_2 = \frac{m_1d_1}{m_2} = \frac{91*0.8}{45} = 1.62m$

So the new location for d2 is 1.62m

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3 years ago