a piano of mass 852 kg is lifted to height of 3.5m how much gravitational potential energy is added to the piano acceleration due to the gravity is g=9.8 m/s2

Answers

Answer 1

Answer: Gravitational potential energy added =

   (mass) x (gravity) x (distance lifted)

   = (852 kg) x (9.8 m/s²) x (3.5 m)

   = (852 x 9.8 x 3.5) kg-m²/s²

   = 29,223.6 joules

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What is the magnitude of the force F on the 1.0 nC charge in the figure ?

Answers

The magnitude of the force F on the 1.0 nC charge 3.11 $e^(-4)$ N.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

In this problem, the 2.0 nC charges both act forces of equal magnitude on the 1.0 nC charge. Since there x-components are equal but opposite, they cancel out and only the y-components remain and add up. This can be used then to calculate for the magnitude of the total electrostatic force.

F = 2 * q1 * q2 / 4 / pi / eps_0 / r^2 * sqrt(3) / 2

F = 2 * 1.0e-9 * 2.0e-9 / 4 / pi / 8.854e-12 / (1.0e-2)^2 * sqrt(3) / 2

F = 3.11 $e^(-4)$ N

The magnitude of the force F on the 1.0 nC charge 3.11 $e^(-4)$ N.

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A corvette can accelerate during high speeds at about 2.0 m/s2. At this rate how long does it take the car to accelerate from 80 km/h to 160 km/h? Answer in seconds. Round to two decimal places.

Answers

Answer:

11.11 s

Explanation:

Given:

u = 80 km/h = 22.22 m/s

v = 160 km/h = 44.44 m/s

a = 2.0 m/s²

Find: t

v = u + at

44.44 m/s = 22.22 m/s + (2.0 m/s²) t

t = 11.11 s

Haloke does 176 J of work lifting himself 0.300m at a constant speed. What is Haloke's mass?

Answers

Since he's lifting himself at constant speed ... not accelerating ... the net vertical force on
him is zero, meaning that he must be lifting with force that's exactly equal to his weight.

Potential energy he added during the lift = (mass) x (gravity) x (height)

Mass = (energy) / (gravity x height) = 176 / (9.8 x 0.3) = 59.864 kg

A unit of power equal to 746 watts is a

Answers

≈ 746 watts is a 1 Horsepower, because that's in the SI base unit.

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Answers

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30? Physical activity

Is paper a good water absorbent ?

Answers

paper is not a good water absorbant.

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