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EleoNora [17]
3 years ago
6

If a 6kg ball is hanging by a rope from the ceiling at rest, what is the tension of the rope?

Physics
1 answer:
Verizon [17]3 years ago
5 0

Answer:

58.8 N

Explanation:

Since the ball is hanging at rest, the net force on the ball must be zero.

There are only two forces acting on the rope:

- Its weight, downward, given by W = mg, where m = 6 kg is the mass of the ball and g=9.8 m/s^2 is the acceleration due to gravity

- the tension in the rope, T, upward

Therefore, the equation for the forces is:

T-W=0

And solving for T, we find:

T=W=mg=(6 kg)(9.8 m/s^2)=58.8 N

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What is the net work done on the 20kg block while it moves the 4 meters?
Vinil7 [7]

Answer:

The answer to your question is 784.8 J. None of your answer, did you forget some information?

Explanation:

Data

mass = 20 kg

distance = 4 m

work = ?

Formula

Work = force x distance

Force = mass x gravity

Process

1.- Calculate the weight of the block

     Weight = 20 x 9.81

     Weight = 196.2 N

2.- Calculate the work done

     Work = 196.2 x 4

     Work = 784.8 J

5 0
4 years ago
Explain two ways in which water’s properties help sustain life.<br><br> Earth Science
hjlf

Answer:

Water is essential for all living things. Water's unique density, high specific heat, cohesion, adhesion, and solvent abilities allow it to support life.

6 0
3 years ago
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A pendulum of mass 5.0 ???????? hangs in equilibrium. A frustrated student walks up to it and kicks the bob with a horizontal fo
Rudiy27

Answer:

a. 37.75°

b. 6.21 m

Explanation:

a. The horizontal force acting on a pendulum bob is given as:

F = mgsinθ

where m = mass of bob

g = acceleration due to gravity

θ = angle string makes with the vertical or angle of displacement

Making θ subject of formula, we have:

θ = sin^{-1}(\frac{F}{mg} )

θ = sin^{-1} (\frac{30}{5*9.8})

θ = 37.75°

The maximum angle of displacement is 37.75°

b. Period of a pendulum is given as:

T = 2\pi\sqrt{ \frac{L}{g} }

where L = length of string

Therefore, making L subject of formula:

L = \frac{gT^2}{4\pi^2}

L = \frac{9.8 * 5^2}{4\pi^2} \\\\\\L = 6.21 m

The string holding the pendulum has to be 6.21 m long.

4 0
3 years ago
A small metal bar whose initial temperature was 20 degrees Celsius is dropped into a large container of boiling water. How long
Vesnalui [34]
Below is the answer. I hope it help.
T ( t ) = C e k t + T m where Tm is the temperature of the surroundings 
T ( t ) = C e k t + T m
T ( 0 ) = 20
T ( 1 ) = T ( 0 ) + 2 = 22
C + T m = 20 C+Tm=20 
C e k + T m = 22

4 0
3 years ago
What is a scalar quantity?
lukranit [14]

A scalar or scalar quantity in physics is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. A scalar is usually said to be a physical quantity that only has magnitude and no other characteristics.

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