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mixas84 [53]
1 year ago
11

During the filming of a movie, a car sits atop a cliff edge. To be able to get the car to move from the cliff, the workers had t

o pry the car with a long bar set upon a fulcrum, in other words, they used a(n) _____.
Physics
1 answer:
stellarik [79]1 year ago
3 0

Answer: Lever

Explanation: Levers are simple machines used to raise heavy loads over a short distance. It involves a beam which could be a plank, rood or metal material placed on a rigid support or pivot called the fulcrum, A Lever increases the the input force or effort applied to produce a greater output force required to move a heavy load. Levers are classed as first, second and third class Levers depending on the arrangement of the load, effort and fulcrum.

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Tyson throws a shot put ball weighing 7.26 kg. At a height of 2.1 m above the ground, the mechanical energy of the ball is 172.1
max2010maxim [7]

Answer:

2.5 m/s

Explanation:

Mechanical energy is the sum of the potential and kinetic energy.

E = PE + KE

E = mgh + ½mv²

172.1 J = (7.26 kg) (9.8 m/s²) (2.1 m) + ½ (7.26 kg) v²

v = 2.5 m/s

7 0
1 year ago
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According to Newton's Law of Universal Gravitation, which of the following would cause the attractive force between a planet and
vladimir1956 [14]

Answer:

it is either a or c

Explanation:

4 0
2 years ago
You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude
klemol [59]
We are given 

the torque requirement of 97 Newton meter. 

The formula of the torque is

τ = r * F * sinθ

where 

τ is the torque
r = radius from the axis of rotation to the point of application. 
F = force exerted 
θ = the angle between the lever arm and the radius

Try to substitute the given and solve for F. 
5 0
1 year ago
|| Climbing ropes stretch when they catch a falling climber, thus increasing the time it takes the climber to come to rest and r
Otrada [13]

To solve this problem it is necessary to apply the concepts related to Newton's second law and the kinematic equations of movement description.

Newton's second law is defined as

F = ma

Where,

m = mass

a = acceleration

From this equation we can figure the acceleration out, then

a = \frac{F}{m}

a = \frac{11*10^3}{80}

a = 137.5m/s

From the cinematic equations of motion we know that

v_f^2-v_i^2 = 2ax

Where,

v_f =Final velocity

v_i =Initial velocity

a = acceleration

x = displacement

There is not Final velocity and the acceleration is equal to the gravity, then

v_f^2-v_i^2 = 2ax

0-v_i^2 = 2(-g)x

v_i =\sqrt{2gx}

v_i = \sqrt{2*9.8*4.8}

v_i = 9.69m/s

From the equation of motion where acceleration is equal to the velocity in function of time we have

a = \frac{v_i}{t}

t = \frac{v_i}{a}

t =\frac{9.69}{137.5}

t = 0.0705s

Therefore the time required is 0.0705s

4 0
2 years ago
Read 2 more answers
Question
nataly862011 [7]

The density of a material is constant and it is given by the ratio of the mass to the volume of the material

The mass of the liquid and the full bottle ae

The mass of the liquid is <u>450 g</u>

The mass of the filled bottle is <u>530 grams</u>

<u></u>

The reason the above values are correct are as follows:

The given parameters are;

Volume of the bottle, V = Half litre

Mass of the bottle, m_b = 80 g

The volume of liquid in the bottle when filled, V = 500 cm³

The density of the olive oil with which the bottle is filled, ρ = 0.9 g/cm³

a. Required:

To calculate the mass of oil in the bottle

Solution:

The volume of oil in the bottle when the bottle is filled, V = 500 cm³

Density, \ \rho = \dfrac{Mass}{Volume}  = \dfrac{m}{V}

The mass of the liquid, m = ρ × V

∴ m = 0.9 g/cm³ × 500 cm³ = 450 g

The mass of the liquid, m = <u>450 g</u>

<u></u>

b. The mass of the oil in the bottle, m = grams

The mass of the full bottle, m_{filled} = m + m_b

∴ m_{filled} = 450 g + 80 g = 530 g

The mass of the full bottle, m_{filled} = <u>530 grams</u>

Learn more about density here:

brainly.com/question/18110802

4 0
1 year ago
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