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4 years ago

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A claw hammer is used to pull a nail from a piece of wood. Where should you place your hand on the handle and where should the n

ail be located in the claw to make the effort force as small as possible?

1 answer:

Alex Ar [27]4 years ago

4 0

<span>You will exert less force the more the lever is longer. So, you need to place your hands as high as possible with the hammers handle.</span>

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What determines the chemical properties of an element? A. the number and arrangement of the electrons in an atom B. the number o

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3 years ago

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4 years ago

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A 9800-N automobile is pushed along a level road by four students who apply a total forward force of 600 N. Neglecting friction,

Alexandra [31]

Answer:

c). $a = 0.60 m/s^2$

Explanation:

As we know that weight of the automobile is given here

so weight = mass times gravity

$W = mg$

$9800 = m(9.8)$

$m = 1000 kg$

now from Newton's law

$F = ma$

$600 = 1000 a$

$a = \frac{600}{1000}$

$a = 0.60 m/s^2$

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3 years ago

Two wheel gears are connected by a chain. The larger gear has a radius of 8 centimeters and the smaller gear has a radius of 3 c

dezoksy [38]

Answer:

B.The linear velocity of the gears is the same. The linear velocity is 432π centimeters per minute.

Explanation:

As we know that the small gear completes 24 revolutions in 20 seconds

so the angular speed of the smaller gear is given as

$\omega = 2\pi\frac{24}{20}$

$\omega = 2.4\pi rad/s$

Now we know that the tangential speed of the chain is given as

$v = r \omega$

so we have

$v = (3 cm)(2.4\pi)$

$v = 7.2 \pi cm/s$

$v = 432\pi cm/min$

Since both gears are connected by same chain so both have same linear speed and hence correct answer will be

B.The linear velocity of the gears is the same. The linear velocity is 432π centimeters per minute.

8 0

4 years ago