3 years ago

Which of the following are examples of levers?

Physics

1 answer:

Ivanshal [37]3 years ago

7 0

Answer:

I think its B C and D

Explanation:

Idk I think this will help :)

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Find the relation, time velocity graph : acceleration of an object, time position graph : ?

Anit [1.1K]

Answer:

In a time-position graph (s-t graph):

slope = velocity

In a time-velocity graph (v-t graph):

slope = acceleration

area under graph = change in displacement (distance travelled)

In a time-acceleration graph (a-t graph):

area under graph = change in velocity

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2 years ago

A force of 250 N is applied to a hydraulic jack piston that is 0.02 m in diameter. If the piston that supports the load has a di

Vikentia [17]

Answer:

option B

Explanation:

given,

Force exerted by the hydraulic jack piston = F₁ = 250 N

diameter of piston, d₁ = 0.02 m

r₁ = 0.01 m

diameter of second piston, d₂ = 0.15 m

r₂ = 0.075 m

mass of the jack to lift = ?

now,

$\dfrac{F_1}{A_1} =\dfrac{F_2}{A_2}$

$\dfrac{250}{\pi r_1^2} =\dfrac{F_2}{\pi r_2^2}$

$\dfrac{250}{0.01^2} =\dfrac{F_2}{0.075^2}$

$F_2= \dfrac{250}{0.01^2}\times {0.075^2}$

F₂ = 14062.5 N

F = m g

$m = \dfrac{F}{g}$

$m = \dfrac{14062.5}{9.8}$

m = 1435 Kg

hence, the correct answer is option B

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3 years ago

What is the mass of an object traveling at 20m/s and having a momentum of 60kg⋅m/s?

vichka [17]

Answer:

m=3kg

Explanation:

Momentum=mass×speed

60[kg m/s]=m[kg]×20[m/s]

We get:

m=3kg

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3 years ago

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gulaghasi [49]

Answer:

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2 years ago

The force to move something toword you is called

faust18 [17]

Answer:

Work

Explanation:

work is defined as the use of force to move an object. For work to be done, the force must be applied in the same direction that the object moves.

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3 years ago